Mia Thermopolis Costume
From awkward teen to Genovian royalty in one iconic poster look.
Mia Thermopolis is the beloved protagonist of Disney's The Princess Diaries, who discovers she is the heir to the throne of Genovia [1.2.8]. Her most famous costume is the iconic movie poster look, which perfectly blends royal elegance with early-2000s teenage rebellion. This outfit consists of a formal white strapless gown paired with casual accessories like dark sunglasses, over-ear headphones, and a sparkling tiara.
- Difficulty
- Easy
- Time
- ~15 min
- Budget
- $35–120
Try it on
See yourself as Mia Thermopolis
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 Mia Thermopolis costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Mia Thermopolis costume — one box instead of 6 pieces.
White strapless dress
A floor-length, strapless white gown, A-line dress, or maxi dress.
DIY: Use a white strapless summer dress or a repurposed prom dress.
Silver tiara
A classic silver rhinestone tiara crown.
DIY: Cut a crown shape out of silver glitter cardstock and glue it to a headband.
White satin gloves
Elbow-length white satin opera gloves.
Black sunglasses
Dark, round or oval black sunglasses.
Wired over-ear headphones
Retro-style black and silver wired headphones with a long cord.
White sneakers
Simple, clean white canvas or leather sneakers.
DIY: Use any comfortable white tennis shoes you already own.
Rather not assemble it? See ready-made Mia Thermopolis costumes at Spirit Halloween ↗
How to put it together
- 1
Put on the white strapless dress.
- 2
Pull on the long white satin gloves, smoothing them up to your elbows.
- 3
Put on the white sneakers for a comfortable, movie-accurate touch.
- 4
Place the silver tiara securely on your head.
- 5
Put on the black sunglasses.
- 6
Drape the wired over-ear headphones around your neck or place them over your ears, letting the cord hang down.
Makeup & hair
Keep makeup natural with a soft pink lip and groomed eyebrows. Style your hair in a sleek, elegant updo or bun to show off the tiara and headphones.
Mia Thermopolis for couples, groups, kids & more
- couples
- Pair up with Queen Clarisse Renaldi in a formal pastel gown and tiara, or Michael Moscovitz in a casual corduroy jacket.
- group
- Gather friends to dress as Lilly Moscovitz (with her signature backpack) and Lana Thomas in her cheerleading uniform.
- kids
- A miniature white ballgown, plastic tiara, and toy headphones make a comfortable and adorable kids' version.
- Plus size
- A white A-line or empire-waist strapless maxi dress offers a comfortable, flattering fit for this royal look.
- pet
- Dress your dog in a small white ruffly dress and a tiny strap-on tiara.
Tips
- For maximum comfort, opt for a flowy white maxi dress rather than a heavy bridal gown.
- Wired headphones are key to the Y2K aesthetic; wireless earbuds won't have the same visual impact.
- If your tiara is heavy, secure it with bobby pins crossed over the inner band.
- This costume is highly budget-friendly if you repurpose a white prom dress or summer sundress.
Mia Thermopolis costume FAQ
- What do you need for a Mia Thermopolis costume?
- The essential pieces are a white strapless dress, a silver tiara, long white satin gloves, black sunglasses, and wired over-ear headphones [1.2.1].
- How do you style your hair for the Princess Diaries look?
- You can either go with Mia's pre-makeover look (frizzy, voluminous hair with barrettes) or her post-makeover sleek updo to match the movie poster.
- What shoes should you wear with this costume?
- White sneakers or black combat boots are perfect, keeping with the movie's poster where Mia wears comfortable shoes under her ballgown.
Did you know? The iconic movie poster pose was actually inspired by a real-life promotional photo of Anne Hathaway taking a break on set while wearing her character's ballgown and personal accessories.