21 Gemini Prompts for Halloween Costumes

Halloween is coming up, and if you’re still figuring out what to wear, I’ve got something fun for you. I spent some time playing around with Gemini’s image creation feature, and the results were pretty impressive.

You can use these prompts to get costume ideas, create reference images for DIY projects, or just see what different costume concepts look like before committing to one. The best part? You can tweak any of these to match your style.

Here’s how to use them: Head over to gemini.google.com or open the Gemini app, start a new chat, select “create image,” and paste any of these prompts. That’s it.

1. Whimsical Female Scarecrow

Create a whimsical female scarecrow costume featuring a rustic, playful aesthetic. The outfit consists of a short brown dress with a flared skirt trimmed in orange ruffles and accented with faux patchwork details in red, orange, and yellow tones. The bodice includes a lace-up front with beige string ties, a plaid heart-shaped central panel, and straw-like fringe at the neckline and shoulders, evoking the look of straw stuffing. The sleeves are off-the-shoulder with elasticized arm bands and straw trim. The skirt hem showcases decorative stitched patches and layered ruffles for a lively, textured appearance. The ensemble is styled with a tall, pointed brown scarecrow hat adorned with a small orange patch, and straw accents peeking from underneath. Accessories include matching brown fingerless wrist cuffs with straw fringe. The look is completed with knee-high brown lace-up boots that feature a rugged, rustic finish. The model’s makeup includes soft orange blush, defined lashes, and a stitched-mouth effect to complement the scarecrow theme, while long blonde braided pigtails enhance the countryside motif.

2. Dark Circus Ringmaster

Create a dark circus ringmaster costume with a sinister, theatrical aesthetic. The outfit features a deep burgundy tailcoat with gold piping, black lapels, and exaggerated cuffs in black faux leather. The interior of the coat’s tails is lined with a pale fabric that contrasts sharply with the dark tones. Beneath the coat, a blue-gray pinstriped vest with gold buttons is worn over a black shirt, complemented by a vivid red satin cravat tied in a loose, dramatic knot at the neck. The lower half includes fitted black trousers tucked into mid-calf black combat boots for a rugged, commanding silhouette. Accessories include a black and white vertically striped top hat with a matching ribbon band and a black cane with a spherical top, enhancing the ringleader persona. The makeup is theatrical and gothic — a white-painted face with dark, exaggerated eyes and a sinister red and black mouth design, adding a macabre, circus-horror effect that contrasts with the polished formality of the costume.

3. Gothic Voodoo Doll

Create a gothic voodoo doll-inspired costume with eerie, handcrafted detailing. The outfit features a short, pale beige dress styled to resemble aged fabric, adorned with bold black stitched markings and faux patchwork seams across the bodice and skirt. The neckline is a wide scoop shape, with slightly puffed cap sleeves adding a doll-like silhouette. A large red heart patch with black stitching decorates the chest, serving as the focal point of the design. The skirt flares outward, layered over bright red tulle for volume and contrast, creating a tattered, haunted appearance. The costume is paired with black patterned tights resembling spiderweb or lace motifs, adding texture and a gothic flair. Accessories include a small stitched voodoo doll prop and a black wrist cuff for accent. The styling features teased, voluminous hair with a disheveled texture, emphasizing a distressed, eerie charm. Makeup includes dark smoky eyes, heavy eyeliner, pale skin, and stitched-mouth detailing drawn with black lines, enhancing the haunted doll aesthetic with a theatrical, Halloween-inspired effect.

4. Horror Biker

Create a rugged, horror-inspired biker costume with a menacing, post-apocalyptic edge. The outfit features a dark denim vest layered over a skeleton-print T-shirt, creating a grim, anatomical motif. The vest is customized with various embroidered patches, metal pins, and insignia, including animal and horror-themed emblems, giving it a distressed, rebellious aesthetic. The sleeves are black and leather-like, adding a mixed-texture, durable appearance. The lower half consists of light blue distressed jeans with torn knees and frayed detailing, paired with black leather boots that contribute to the tough, biker-style foundation. Accessories include an aged axe slung over the shoulder, enhancing the costume’s dangerous, slasher-inspired tone. The makeup design is theatrical and intimidating — featuring blacked-out eyes, red streaks resembling dripping blood across the forehead, and a sharply contoured beard that intensifies the character’s grim expression. The overall look combines biker culture with horror iconography, producing a sinister, road-warrior aesthetic suitable for Halloween or dark fantasy styling.

5. Modern Witch

Create a modern witch costume with a sleek, classic silhouette and elegant gothic styling. The outfit features a short black dress with a flared skirt and voluminous layers of tulle or lace at the hem, creating a soft, dramatic shape. The bodice has sheer black mesh sleeves with puffed shoulders and a high mesh neckline inset that adds texture and sophistication. A glossy black belt cinches the waist, emphasizing a structured fit-and-flare silhouette. Accessories include a tall, pointed witch hat with a wide brim and a velvet band, adding a traditional yet refined element. The ensemble is complemented by black velvet gloves and simple black heels for a polished, enchanting finish. The look is completed with vintage-inspired makeup—bold red lipstick, dark eyeliner, and softly curled blonde hair cascading beneath the hat. A wooden broomstick serves as a classic witch accessory, enhancing the magical and mysterious character of the design.

6. Eerie Clown

Create a whimsical and eerie clown-inspired costume design featuring a short, flared dress in a red, white, and black palette. The bodice is primarily black with a round neckline and adorned with oversized pom-pom accents in red and white at the center front. The dress has contrasting panels — black-and-white polka dots on the sides and vertical red-and-white stripes along the hemline — creating a playful yet theatrical aesthetic. The sleeves are sheer black tulle, tied with ribbons at the arms for volume and texture. The skirt is structured for a bell-like silhouette, emphasizing a vintage circus style. The look includes knee-high red socks with a subtle glitter or patterned texture and black lace-up shoes. Accessories include a matching ruffled clown collar in red and white stripes and a small mini hat headpiece with a red pom-pom accent, completing the classic harlequin theme. Makeup is dramatic and artistic, with exaggerated red eyeshadow and painted facial designs inspired by traditional clown motifs. The overall appearance combines playful carnival energy with a dark, theatrical twist suitable for costume or fantasy fashion.

7. Dark Academic School Uniform

Create a dark academic-inspired school uniform with a gothic aesthetic. The outfit features a structured black blazer with subtle vertical pinstripes, a notched lapel, and a single front button closure. The blazer is worn over a crisp white collared shirt and paired with a black tie for a formal, disciplined look. A distinctive school-style crest patch with the initials “N” and “A” is positioned on the left chest, adding a traditional emblematic detail. The lower half consists of a high-waisted, mid-calf-length pleated skirt in matching black with fine vertical stripes, contributing to a uniform, elongated silhouette. Black opaque tights and polished lace-up oxford shoes complete the ensemble, reinforcing the academic tone. The styling includes two long, tightly braided pigtails and dark, defined makeup with pale skin tones and a bold red lip for contrast. The overall design combines Victorian school uniform elements with a modern gothic sensibility, perfect for a mysterious, intellectual character aesthetic.

8. Fantasy Elf

Create a whimsical elf or fantasy candy-land-inspired costume with a playful, retro look. The outfit features a short-sleeved, button-up shirt in dark plaid tones—navy, green, and red—accented with large white buttons and an oversized rounded white collar for a childlike aesthetic. The bottom half includes high-waisted, forest-green shorts with a jagged hem, designed to mimic leaf-like or fantasy tailoring details. Underneath, the character wears white-and-green horizontally striped tights, adding contrast and visual rhythm. The shoes are curled-toe elf-style in black, complete with whimsical upturned tips, maintaining the playful fantasy motif. Accessories include a large rainbow-colored lollipop and an orange wig styled with exaggerated curled tufts, evoking a cartoonish, cheerful personality. The overall design combines elements of classic storybook elves and candy-themed fantasy characters, ideal for theatrical or themed costume concepts centered on whimsy and charm.

9. Elegant Enchanting Witch

Create an elegant and darkly enchanting witch costume with gothic sophistication. The ensemble features a long, flowing black gown made from layered fabrics — a fitted velvet bodice with structured seams and a dramatic, floor-length skirt that combines soft draping with slight volume for movement. The bodice includes a silver-buckled waist belt detail, enhancing a cinched, hourglass silhouette. Over the gown, a sheer olive-green overskirt and matching long train-like panels cascade from the waist, adding contrast and ethereal texture. The sleeves are long and fitted, ending in pointed cuffs, emphasizing the sleek witchy profile. The outfit is styled with tall black heeled boots and black gloves. A classic pointed witch hat with an oversized olive-green bow and trailing tulle veil completes the look, paired with a prop broomstick for a dramatic, storybook aesthetic. The model’s makeup includes dark lips, smokey eyeshadow, and silver-gray hair cascading in waves, adding a spectral, otherworldly tone. The look balances timeless witch archetypes with gothic high fashion, ideal for a powerful, mysterious fantasy character design.

10. Classic Scarecrow

Create a classic scarecrow-inspired costume with a rustic, storybook aesthetic. The outfit features a long-sleeved orange tunic top with a jagged hem and cuffs, evoking a hand-cut, homespun look. The neckline is decorated with a wide burlap-like brown collar adorned with straw-like raffia details, giving the appearance of hay stuffing emerging from the costume’s edges. The pants are loose-fitting and deep blue, gathered at the ankles with additional raffia trim and accented with sewn-on plaid fabric patches in orange and brown tones to suggest mending and wear. A simple rope belt is tied at the waist, enhancing the handmade, rural character style. Accessories include a traditional brown pointed hat with a patch detail and a small black crow perched on the shoulder, reinforcing the scarecrow motif. The costume is completed with brown shoes or boots accented by straw embellishments. The overall design captures the charming, folkloric essence of a harvest-season scarecrow — humble, friendly, and slightly whimsical, suitable for fantasy, fall festivals, or theatrical costume use.

11. Vampire Lord

Create an opulent and commanding vampire lord costume with a gothic romance aesthetic. The centerpiece is a high-collared, floor-length coat of black velvet, lined with a deep blood-red silk that flashes with movement. The coat is adorned with subtle silver filigree embroidery along the lapels and cuffs. Beneath it, a crimson brocade vest with ornate silver buttons is worn over a pristine white ruffled poet shirt, fastened at the neck with a dark ruby cravat pin. The trousers are tailored and black, tucked into polished black leather riding boots. Accessories include black leather gloves, a silver signet ring on one finger, and an elegant, silver-topped cane. The makeup is pale and flawless, with subtly darkened eyes, elongated canines, and a touch of red at the lips. The hair is styled back, perhaps with a distinguished streak of silver, to complete the look of timeless, predatory elegance.

12. Pumpkin Print Dress

Create a Halloween-inspired outfit featuring a sleeveless fit-and-flare mini dress with a bold, all-over pumpkin print in bright orange against a black background. The dress has a round neckline and a structured silhouette that accentuates the waist, cinched with a wide black faux-leather belt adorned with silver studs and grommet details. Layer underneath a sheer black long-sleeve blouse with voluminous, puffed sleeves and buttoned cuffs, adding gothic sophistication through its translucent texture. Style with over-the-knee black socks and accessorize with silver jewelry, including layered necklaces and rings. The look is completed with thematic props — a black pumpkin-shaped bucket with a glowing jack-o’-lantern face and an ornate book titled “Halloween” — enhancing the dark, festive aesthetic.

13. Contemporary Witch

Create a modern witch-inspired outfit featuring a black mini dress with gothic detailing. The dress has a lace-up corset-style front with thin black ribbons threaded through metal eyelets, creating a fitted bodice that cinches at the waist. The sleeves are made of semi-sheer black lace with floral patterns, flaring dramatically into bell cuffs that add volume and movement. The skirt portion falls in a soft A-line shape, providing balance to the structured upper design. Pair the look with a tall, pointed witch hat that has a slightly curled tip for a whimsical silhouette. Accessorize with a black lace choker adorned with a gemstone pendant to enhance the dark romantic theme. Complete the ensemble with mid-heeled black ankle boots and a slim black broomstick prop, emphasizing a sleek, contemporary witch aesthetic. The makeup includes deep red lips and defined eyes, contributing to a bold and mysterious overall look.

14. Dark Magician

Create a fashion design inspired by a gothic voodoo or dark magician aesthetic. The outfit features a long black trench coat adorned with white symbolic embroidery, including voodoo-style sigils and skeletal motifs. Beneath the coat, include a deep burgundy brocade vest with a subtle floral texture, worn over a black dress shirt. The look pairs with slim black pants and black lace-up combat boots for a rugged finish. Accessories include a tall black top hat decorated with red feathers and skull accents, multiple bone and bead necklaces, and black fingerless gloves. Add statement props such as a snake and ritual beads to enhance the mystical theme. The face design includes skull makeup with hollowed eyes and a skeletal jaw, emphasizing a supernatural and theatrical atmosphere.

15. Medusa Serpent Queen

Create a fashion design inspired by a dark mythological Medusa or serpent queen aesthetic. The look features a flowing emerald-green satin gown with a deep V neckline, cinched at the waist with a gold braided belt that drapes loosely to one side. The dress has an asymmetrical slit revealing black fishnet stockings, giving the outfit a modern edge. A long, sheer gray cape is attached at the shoulders, adding movement and a mystical quality. The headpiece is a dramatic gold serpentine crown shaped like intertwining snakes, complementing the long, wavy, pale green wig. Accessories include a statement necklace with dark gemstone details. The makeup features pale, ethereal skin, blood-red lips, and striking white contact lenses to evoke a petrifying gaze. Red markings resembling claw or serpent scratches adorn the arms and neck, enhancing the supernatural theme. The overall look merges ancient mythology with dark fantasy elegance.

16. Horror Slasher

Create a fashion design inspired by a modernized horror-slasher aesthetic with a femme twist. The outfit features a cropped red-and-black striped knit sweater with long sleeves and a raw hem, revealing a black lace bralette underneath. It is paired with a high-waisted black mini skirt with a clean, fitted silhouette, complemented by patterned fishnet tights that add visual texture. Accessories include a signature metallic clawed glove on one hand, designed with long silver blades and a dark mechanical base. A wide-brimmed black fedora adds a dramatic, iconic touch. The makeup includes one side of the face detailed with realistic burn or scar texture in deep red and brown tones, contrasted with a natural finish on the other side and a single white contact lens for an eerie effect. The look balances horror iconography with bold, stylish sensuality, suitable for a dark fantasy or cinematic costume concept.

17. Theatrical Jester

Create a costume design featuring a shirtless male character with a theatrical, jester-inspired aesthetic. He wears grey cargo pants with multiple pockets, styled with a purple bandana tied around the right thigh. The look is accessorized with wide, purple-and-black checkered suspenders over bare skin and fingerless purple fishnet gloves. He completes the outfit with black combat boots that have thick soles and buckle accents, lending a rugged edge. A magenta fedora-style hat adds a playful pop of color and coordinates with the purple accessories. The character holds a jester-themed staff topped with a sculpted jester head in black, red, and white, with alternating red-and-black stripes down the shaft. His makeup features stark white face paint with bold black shapes around the eyes and mouth, resembling a dark clown or theatrical mime. The overall style merges carnival jester motifs with streetwear and gothic punk influences, emphasizing eccentricity and contrast in texture and color.

18. Halloween Nurse

Create a Halloween-inspired nurse costume featuring a short, form-fitting white zip-up mini dress with red trim accents along the collar, sleeves, and hemline. The dress includes red cross emblems on two front patch pockets and a deep V-neckline. Style the look with thigh-high red stockings and red platform heels with a glossy finish for a bold, cohesive appearance. The outfit is accessorized with a pumpkin-shaped candy bucket, adding a playful Halloween touch. The model’s makeup includes red lipstick and subtle eyeliner, complementing the red accents of the costume.

19. Devil Costume

Create a bold Halloween devil costume featuring a glossy red faux-leather corset-style bodysuit with a sweetheart neckline and structured boning for a sculpted fit. Pair it with opaque red tights that create a seamless, full-coverage effect from waist to toe. Complete the ensemble with red platform heels in a shiny material that matches the bodysuit’s finish. The outfit is accessorized with red devil horns and an orange pumpkin-shaped candy bucket for a playful Halloween element. The makeup includes red lipstick and softly defined eyes, harmonizing with the fiery red palette of the costume.

20. Distressed Streetwear Skull

Create a distressed Halloween streetwear-inspired costume featuring a fitted white T-shirt with deliberate rips, small holes, and smears resembling dried blood for a rugged, post-apocalyptic effect. Pair it with slim black jeans to maintain a simple yet edgy silhouette. The look includes a black-and-white bandana worn across the forehead for an urban touch. Makeup consists of a half-face skull design painted in black and white, emphasizing hollow eye sockets and teeth detailing for a skeletal illusion. The overall styling balances casual wear with macabre Halloween aesthetics.

21. Pirate Captain

Create a pirate-inspired costume featuring an off-the-shoulder olive green dress with long puffed sleeves gathered at the wrists and a fitted bodice overlaid with a black velvet corset-style vest. The corset includes gold trim detailing and black lace-up front ties, accentuating the waist. The skirt section combines olive green fabric with a deep red velvet panel, giving it a layered, asymmetrical appearance. A wide brown belt cinches the waist, adding structure to the ensemble. The outfit is accessorized with a black tricorn hat adorned with gold trim and a white skull-and-crossbones emblem. The look is completed with a black choker necklace and natural yet defined makeup with a subtle shimmer, enhancing the adventurous pirate aesthetic.

These prompts give you a starting point. Feel free to modify them based on what you have in your closet or what you can pull together. You can change colors, swap accessories, or mix elements from different prompts to create something unique.