Alvin and the Chipmunks Wiki
Alvin and the Chipmunks Wiki

Theodore Jameson Seville is one of The Chipmunks and the overall tritagonist of the series and films. He is the youngest of the The Chipmunks and is best described as loving, caring, kind, sweet, innocent, sensitive, shy, trusting, gullible, and naïve. However he wasn’t always the youngest. Especially in the Alvin show


60s Series[]

In The Alvin Show, Theodore was commonly known for his adorable giggling whenever he feels happy or chats with his family. Unlike other incarnations, Theodore was taller than Alvin, but still shorter than Simon. When it came to mischief, though he and Simon follow Alvin as they play, Theodore was second in line. His personality wasn't fully developed until the 1980's. Theodore is shown to be a big eater.

80s Series[]

Theodore is a character that has a great interest in the culinary arts in the 1980’s and 1990’s television series. He is considered naive, friendly, cheerful and accepting. He is also portrayed to be the smallest and the youngest. Theodore is often seen with a teddy bear in some episodes as well as Alvin and the Chipmunks Meet Frankenstein and Alvin and the Chipmunks Meet the Wolfman. Theodore's love for cooking is often seen in episodes such as Father's Day Muffins and Every Chipmunk Tells A Story. He is found to care deeply about his self-image trying on numerous occasions to attempt to become more fit or at the very least, trying to lose a little weight as seen in The Picture of Health and The Brunch Club. Additionally, he is seen being close to Simon.

CGI Films[]

Theodore is a chipmunk who helps out his brothers in their time of need. His primary instrument is the drum. His signature color is green. He is very gullible and innocent, always letting Alvin get to him with his schemes. He is shown to have nightmares (as well as frequent fears such as eagles and jungle monsters) and often sleeps with Dave in the first movie. He is shown in Alvin and the Chipmunks: The Squeakquel to be somewhat sensitive about his weight when the bullies poke his belly and butt and call him fat, even going as far as saying that he has "serious junk in the trunk." Alvin and Simon get furious upon seeing their little brother get picked on because of his weight and claw them up as a result, taking care and watching after their little brother. He has a crush on Eleanor Miller, one of The Chipettes who has similar traits of Theodore, and shares his same interests, but is not as gullible. She returns his feelings, but feels that he should stand up for himself more.

CGI Series[]

Theodore retains his innocent, gullible and naive nature, but loses the sensibility over his weight as seen in the CGI films that was unlike him in the 1980s. He still loves the culinary arts. He is seen more as the younger brother that is either taken advantage of or ignored by both of his brothers in the series. Despite his kind and sweetness, he has picked up some of his brothers' habits when he gets upset by either giving an attitude or pitching a fit. Theodore is seen a number of times carrying a teddy bear (Talking Teddy and Lil'T). He is also terrified of clowns (Clowning Around) and does not always chew his food (Curiosity).


Theodore is commonly seen wearing a dark green top. He is the second shortest chipmunk, slightly taller than Eleanor, in all films and series except The Alvin Show in which he is taller than Alvin but shorter than Simon.

Before The Alvin Show, Theodore wore a pink vest with a "T" in it. After The Alvin Show was created, Theodore was given more human features. He wears a dark green sweater and black shoes.

In the Alvin and the Chipmunks series, Theodore wears a green sweater, and a pair of white and blue pattered sneakers. In the first 5 seasons, he has black eyes, and in the Chipmunk Adventure and season 6-8 his eyes become green. For pajamas, he wears green footsies.

In the CGI/live-action films, Theodore has dirty blond fur and green eyes. He only wears a green hoodie. His appearance was modified to look more closely to a real life chipmunk.

In ALVINNN!!! and The Chipmunks, Theodore wears a green zipped-hoodie, which has a lighter shade of green on the hood, light blue jeans that are folded at the bottom, and white, cream, and green colored sneakers with green laces. He has dirty blonde hair and brown eyes. His pajamas consist of a matching set of a white and green striped long-sleeved shirt and pants.



Theodore and Dave have an extremely close bond. Theodore loves making things for Dave. For example, Theodore made a Get Well card for Dave when he was in the hospital in Alvin and the Chipmunks: The Squeakquel and he made a special necklace for Dave in Alvin and the Chipmunks: Chipwrecked. Dave loved the necklace that Theodore made for him and Theodore loved seeing his adoptive father happy.


Theodore is often teased, picked on, and sometimes taken advantage of by Alvin which causes tension in their relationship. Despite all of this, they are more close than at first glance especially in the 2015 series. When trouble arises such as Theodore getting picked on, Alvin will stand up for him. Although, despite Theodore being the youngest, Theodore is often smarter and wiser than Alvin.


Theodore can always count on Simon to look after him, especially in the 1980s series. Theodore stays close to Simon, because he knows Simon will protect him, because they love each other. Though at times Simon gets frustrated with Theodore sometimes because Theodore quite doesn't listen to what Simon says. Despite that, they get along fine.


Theodore and Eleanor are the most open about their relationship. They spend lots of time together and enjoy each other's company. In Alvin and the Chipmunks Meet the Wolfman Theodore gives Eleanor a necklace. They are shown to be married as adults in Big Dreams.


Theodore and Jeanette are friends, but they don't interact very often. In The Brunch Club, Jeanette stands up for him when Alvin, Simon, and Brittany tease him about his weight. In Jeanette Enchanted, he gives a witch/wizard hat to Jeanette on her birthday to extend her "magical powers."


Theodore and Brittany are friends, but they do not interact very often. She seems to care about Theodore such as in Dragon Dad when she didn't want to take the dragon egg from Theodore, but did so because she didn't want him to be upset when it didn't hatch.


  • Culinary Arts: He is very good at cooking and baking.
  • Kindness: He is very kind and nice to others, and is much better at protraying it than Alvin and Simon.
  • Intelligence: Although, not as smart as Simon, but he’s at least smarter than Alvin.


Theodore: Since when did Alvin feel like playing Around The World In 30 Days? - (The Chipmunk Adventure)
Theodore: Simon, I feel kind of funny about tricking Miss Miller. - (The Chipmunk Adventure)
Theodore: Better get in, Simon! - (The Chipmunk Adventure)
Theodore: And one quesa...dilla. - (The Chipmunk Adventure)
Theodore: I'll have a large order of couscous, a-and 2 yalanchi domas. Quickly, please! - (The Chipmunk Adventure)
Theodore: I'm sorry, Miss Miller. - (The Chipmunk Adventure)
Theodore: Natasha! Natasha! Daddy's gone!! - (Meet Frankenstein)
Theodore: The ants in France stay mainly in my pants. - (Meet Frankenstein)
Theodore: Guys! I think he made it angry! - (Alvin and the Chipmunks)
Theodore: Ooh! Muffins! - (Alvin and the Chipmunks)
Theodore: This is the greatest day of my life! - (Alvin and the Chipmunks)
Theodore: But…we talk. - (Alvin and the Chipmunks)
Theodore: Help! Crazy robot! Help! It's after me! It's after me! - (Alvin and the Chipmunks)
Theodore: I thought my heart was gonna explode! - (Alvin and the Chipmunks)
Theodore: I was just trying to help, Dave! You...had garlic breath. - (Alvin and the Chipmunks)
Theodore: He really did have garlic breath! - (Alvin and the Chipmunks)
Theodore: Those aren't pineapples! That's our family! - (Alvin and the Chipmunks)
Theodore: Has anyone tried the chocolate meatballs? - (Alvin and the Chipmunks)
Theodore: Hi, I'm Theodore. - (The Squeakquel)
Theodore: Aah! Eagle! Eagle! Aah! Bully! Bully! - (The Squeakquel)
Theodore: She's like a beautiful, green gumdrop. - (The Squeakquel)
Theodore: Now that was huge! - (The Squeakquel)
Theodore: Please don't eat my brain! - (Chipwrecked)
Theodore: He can't hear you. He's wearing his I-Can't-Hear-Alvin Headphones. - (What A Gem)
Theodore: Oh, I hope he doesn't like Eleanor. Secret Admirer:


  • The origin of his name comes from Theodore Keep.[1]
  • In the 1960s The Alvin Show, Theodore was known for being the one who giggles.[1] This changes into the 1980's for being the one who cooks. Theodore's character traits changed one more time for the modern CGI/live-action films to be the "fat" and sensitive chipmunk.
  • In the CGI television series, Theodore's middle name is Jameson, as stated in Lil'T.
  • He became a vegetarian in How You Gonna Keep 'Em Down on the Farm? due to his love of Clarence the calf, and this was mentioned by Dave in Alvin and the Chipmunks Meet the Wolfman when Theodore inquires about steak. He is the only chipmunk who is canonically a vegetarian, as the others have been shown eating meat on occasion.
  • His main instruments while performing with The Chipmunks are the percussion instruments especially the drums.

Also see[]


  1. 1.0 1.1 Alvin and the Chipmunks History,, Retrieved 2015-07-16.