Does Theodore's hoodie have a letter on it?

In the classic animated series, Theodore's green hoodie is plain. However, many modern costumes and toy designs add a white capital 'T' to match Alvin's 'A' and Simon's 'S' for easier identification.

What color are Theodore's eyes?

Theodore originally had black eyes, but in later animated series and films, his eyes were changed to a light green to match his signature hoodie.

How do I make a quick DIY Theodore costume?

All you need is a bright green hoodie, brown pants, and a brown headband. You can quickly cut ear shapes out of brown construction paper or felt and tape them to the headband.

AI-generated example

Theodore Costume

Dress up as everyone's favorite sweet and lovable green-hooded chipmunk.

Theodore is the youngest, sweetest, and most gullible brother from the iconic trio Alvin and the Chipmunks. This cozy costume is a popular choice for solo nostalgic looks, couples, or classic group themes. The signature style is incredibly comfortable, centering around an oversized green hoodie and cute chipmunk ears.

Difficulty: Easy
Time: ~20 min
Budget: $20–50

See yourself as Theodore →What you need Buy the Theodore costume

Try it on

See yourself as Theodore

One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.

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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.

Theodore costume — Example look · AI-generated

You as Theodore

Result

What you need for a Theodore costume

Short on time? Buy it ready-made

Spirit Halloween sells the complete Theodore costume — one box instead of 5 pieces.

Shop Theodore at Spirit ↗

Green pullover hoodie
A bright green, oversized fleece pullover hoodie. You can optionally add a large white capital letter 'T' to the front.
DIY: Use a plain green sweatshirt and fabric-glue a large capital 'T' cut from white felt onto the chest.
Amazon
Chipmunk ears headband
A comfortable headband featuring round, fuzzy brown ears with light pink or tan inner lining.
DIY: Cut ear shapes out of brown and pink felt, stiffen them with cardboard inserts, and glue them to a plain brown headband.
Amazon
Brown leggings or pants
Form-fitting brown leggings or slim-fit pants to represent chipmunk fur.
DIY: Any pair of brown sweatpants or jeans you already own will work perfectly.
Amazon
White and blue sneakers
Classic white low-top sneakers featuring blue stripes or blue accents.
DIY: Wear plain white sneakers and use blue painter's tape to temporarily add stripes to the sides.
Amazon
Plush chipmunk tail
A small, stubby brown plush tail that clips onto the back of your pants.
DIY: Sew a small tube of brown felt, stuff it with cotton balls, and safety-pin it to your waist.
Amazon

Rather not assemble it? See ready-made Theodore costumes at Spirit Halloween ↗

How to put it together

1
Put on the brown pants or leggings to serve as the chipmunk's lower body.
2
Slip on the oversized green pullover hoodie, ensuring it fits loosely and comfortably.
3
Lace up your white and blue patterned sneakers.
4
Place the chipmunk ears headband securely on your head, positioning it just behind your hairline.
5
Attach the clip-on brown plush tail to the back of your pants or the lower hem of the hoodie.
6
Use face paint or an eyeliner pencil to draw a small black button nose and three whiskers on each cheek.

Makeup & hair

Keep your hair simple or tucked neatly behind your ears under the headband. Use a black or dark brown makeup pencil to draw a cute, round chipmunk nose on the tip of your nose, along with three quick whisker lines on each cheek.

Theodore for couples, groups, kids & more

couples: Pair up with Eleanor Miller from the Chipettes, who wears a matching green outfit with pigtails.
group: Team up with Alvin in his red 'A' hoodie and Simon in his blue hoodie with round black glasses.
kids: An adorable and warm choice for toddlers using a green fleece hooded jumpsuit with felt ears sewn to the hood.
Plus size: An oversized green fleece hoodie provides a highly screen-accurate, comfortable, and relaxed fit.
pet: A small green dog hoodie paired with a lightweight brown felt ear headpiece.

Tips

Carry a large fake acorn or a chocolate chip cookie as a fun prop, since Theodore is famous for his love of snacks.
If you are doing a group costume, make sure the shades of your hoodies match in brightness for the best photos.
Keep the hood down so your chipmunk ears headband remains fully visible.
For cold outdoor trick-or-treating, layer thermal underwear beneath the hoodie and leggings.

Theodore costume FAQ

Does Theodore's hoodie have a letter on it?: In the classic animated series, Theodore's green hoodie is plain. However, many modern costumes and toy designs add a white capital 'T' to match Alvin's 'A' and Simon's 'S' for easier identification.
What color are Theodore's eyes?: Theodore originally had black eyes, but in later animated series and films, his eyes were changed to a light green to match his signature hoodie.
How do I make a quick DIY Theodore costume?: All you need is a bright green hoodie, brown pants, and a brown headband. You can quickly cut ear shapes out of brown construction paper or felt and tape them to the headband.

Did you know? Theodore's signature green color was chosen to contrast with Alvin's bold red and Simon's cool blue, establishing their distinct personalities right from their 1950s debut.