Luca Costume
Transform from a curious sea monster into a stylish Italian Riviera local.
Based on the hit Disney Pixar film, a Luca costume lets you bring the adventurous young sea monster to life. You can choose between his casual human outfit from Portorosso or his vibrant, scaled sea creature form. It is a fantastic, colorful choice for kids, families, and Disney fans alike.
- Difficulty
- Medium
- Time
- ~45 min
- Budget
- $25–65
Try it on
See yourself as Luca
One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.
One render, $1. No account needed — if it fails you're not charged. Pricing.
Your photo is sent to Google's Gemini API to make the render and isn't used for training. Renders are AI-generated and labelled.
Want a different costume on this photo, or a whole group in costume? Open the Try-On Studio.
What you need for a Luca costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Luca costume — one box instead of 6 pieces.
Off-white plaid shirt
A short-sleeved, collared button-down shirt with a subtle light blue or green plaid pattern.
DIY: Use a plain white short-sleeve shirt and draw light blue grid lines with fabric markers.
Rolled-up denim shorts
Classic blue denim shorts rolled up slightly above the knee.
DIY: Cut an old pair of blue jeans into shorts and cuff the hems.
Green scaled rash guard
A long-sleeve green swim shirt printed with fish scale patterns to represent his sea monster skin.
DIY: Use fabric paint and a celery stick or sponge cut into a U-shape to stamp green scales onto a plain green shirt.
Green scaled leggings
Matching green leggings with a fish scale print to complete the sea monster limbs.
DIY: Stamp U-shaped scale patterns onto plain green leggings using dark green fabric paint.
Sea monster tail
A plush, fabric-covered tail in shades of blue and green with purple fins at the tip.
DIY: Sew a simple tail shape out of green felt, stuff it with batting, and attach purple felt fins to the end.
Purple scale beanie or hood
A headpiece featuring purple scale-like hair tufts and large, expressive sea monster ears.
DIY: Glue layers of purple felt teardrop shapes onto a green beanie to mimic his sea monster hair.
Rather not assemble it? See ready-made Luca costumes at Spirit Halloween ↗
How to put it together
- 1
Put on the green scaled rash guard and matching scaled leggings as the base layer to represent Luca's sea monster skin.
- 2
Layer the off-white plaid short-sleeve shirt over the rash guard, leaving it unbuttoned or partially buttoned.
- 3
Pull on the denim shorts over the leggings, rolling the cuffs up slightly.
- 4
Attach the plush sea monster tail to the back of the shorts waistband using a safety pin or a built-in belt loop.
- 5
Put on the purple scale beanie or hood, ensuring the sea monster ears sit flat on the sides of the head.
- 6
Finish the look with simple green sneakers or go barefoot if posing indoors.
Makeup & hair
If not using a hood, style hair in messy, wavy curls using styling wax, or paint face and neck with light green and teal face paint, adding subtle scale details along the cheekbones.
Luca for couples, groups, kids & more
- couples
- Pair up with Alberto Scorfano in his matching yellow tank top and rolled-up brown shorts.
- group
- Add Giulia Marcovaldo with her red hair, blue jeans, and striped shirt to complete the Portorosso trio.
- kids
- An official one-piece jumpsuit with an attached hood and tail is comfortable and easy for trick-or-treating.
- Plus size
- Use stretchy, breathable athletic fabrics for the scaled base layers to ensure a comfortable, flexible fit.
- pet
- A simple green and blue scaled dog bandana with a small plush tail attachment.
Tips
- If wearing the costume outdoors in cool weather, the layered long-sleeve rash guard and leggings will keep you warm.
- Use safety pins to secure the tail firmly to the waistband so it doesn't drag or sag while walking.
- For photos, pose near water, a wooden dock, or a colorful Italian-style stone wall to match the film's Riviera setting.
Did you know? The filmmakers designed Luca's sea monster form with rounder, softer shapes to reflect his gentle, curious nature, contrasting with Alberto's sharper, more angular design.