Theodore Costume
Dress up as the sweetest, food-loving chipmunk in a cozy green hoodie.
Theodore is the lovable, sweet-natured youngest brother of the Chipmunks trio. This costume is incredibly popular for groups, couples, and families because it is exceptionally comfortable and easy to assemble. The look centers around his signature bright green oversized hoodie, simple chipmunk ears, and cute face paint.
- Difficulty
- Easy
- Time
- ~20 min
- Budget
- $15–45
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.
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 Theodore costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Theodore costume — one box instead of 6 pieces.
Green oversized hoodie
A bright green, comfortable hooded sweatshirt, preferably fleece or heavy cotton.
DIY: Use any plain green sweatshirt you already own.
White felt sheet
A single sheet of stiff white felt to cut out the signature letter 'T'.
DIY: Use white paper or white tape for a temporary option.
Chipmunk ears headband
A brown headband featuring round, fuzzy brown and pink felt ears.
DIY: Cut ear shapes out of brown cardboard or felt and hot-glue them to a plain brown headband.
Brown leggings or sweatpants
Simple brown pants to represent the chipmunk's fur.
DIY: Wear any dark brown or black pants from your closet.
Brown eyeliner or face paint
A makeup pencil or face paint pot to draw the nose and whiskers.
DIY: Use a standard brown makeup eyeliner pencil.
Plush cookie prop
A soft plush chocolate chip cookie or donut to highlight Theodore's love for snacks.
DIY: Cut a cookie shape out of brown cardboard and draw chocolate chips on it with a black marker.
Rather not assemble it? See ready-made Theodore costumes at Spirit Halloween ↗
How to put it together
- 1
Cut a large capital letter 'T' out of the white felt sheet, making sure it is proportional to the chest of your green hoodie.
- 2
Attach the white felt 'T' to the center of the green hoodie using fabric glue, safety pins, or double-sided tape.
- 3
Put on the brown leggings or sweatpants, then pull on the oversized green hoodie.
- 4
Place the chipmunk ears headband on your head, adjusting it so it sits securely in your hair.
- 5
Use the brown eyeliner to paint a small triangle on the tip of your nose and draw three quick whisker lines on each cheek.
- 6
Carry your plush cookie prop to complete Theodore's signature food-loving look.
Makeup & hair
Keep your hair simple, flat, or tucked slightly behind your ears. Use brown eyeliner to draw a cute chipmunk nose and whiskers, and apply a generous amount of pink blush to your cheeks to mimic Theodore's chubby, cheerful face.
Theodore for couples, groups, kids & more
- couples
- Pair up with Eleanor Miller from the Chipettes, who also wears green, or Dave Seville in his classic blue button-down shirt.
- group
- Team up with friends dressed as Alvin (red hoodie with an 'A') and Simon (blue hoodie with an 'S' and round black glasses).
- kids
- Use a green toddler-sized hoodie, brown sweatpants, and a soft felt ear headband for a warm, comfortable kids' costume.
- Plus size
- Choose an extra-oversized green fleece hoodie for a cozy, relaxed fit that naturally captures Theodore's round, cuddly silhouette.
- pet
- Dress your pet in a simple green dog hoodie with small felt ears attached to the hood.
Tips
- Choose a thick fleece hoodie if you plan to wear this costume outdoors in cool autumn weather.
- If you prefer the classic cartoon look, you can omit the white 'T' on the chest, as Theodore originally wore a plain green sweater.
- Keep a real cookie or snack in hand for fun, character-accurate poses in photos.
Theodore costume FAQ
- What color hoodie does Theodore wear?
- Theodore wears a bright green hooded sweatshirt.
- How do I make the 'T' on Theodore's hoodie?
- Cut a capital letter 'T' out of white felt and attach it to the chest of a green hoodie using fabric glue, safety pins, or double-sided tape.
- What are good group costume ideas for this?
- Theodore is best paired with his brothers Alvin (in a red 'A' hoodie) and Simon (in a blue 'S' hoodie with round black glasses).
Did you know? Theodore was named after Theodore Keep, the co-founder of Liberty Records, which released the original Chipmunks novelty records in 1958.