- This article is about the characters. For other uses, see Alvin and the Chipmunks (disambiguation).
Alvin is the oldest of the three and is the leader of the group and he claims himself the "awesomest" one when in fact that is his way of getting into trouble. Alvin has often seen wearing a red sweatshirt with a giant yellow 'A' on the front and a red cap. Alvin is not the tallest, like Brittany. He and Brittany have a love-hate relationship. Alvin loves to have fun and is adventurous but he is not cautious. Unlike Brittany, Alvin never loses his temper under every circumstance even if he and the boys face trouble. Like being stuck on a tropical island in Chipwrecked. However it is noted that he does get mad at Simone for not listening to him.
Simon is the middle brother in age and the tallest of the boys. Simon is often been pictured in a blue sweatshirt, glasses, and often with a book in his hands. Just like Jeanette, he is the tallest and the smartest. He and Jeanette have a good relationship but, due to their shy nature, are afraid to show it. In Alvin and the Chipmunks: Chipwrecked, his affection is more clearly shown after a spider's bite changes Simon into a romantic, fun-loving Simone.
Theodore is the youngest and the sweet one. He is often seen wearing a green sweatshirt with his teddy bear or a food in his hands. Along with his sweet personality, he is also kind and friendly, just like Eleanor. He and Eleanor have a friendly relationship which they are not shy about.
- Main article: The Alvin Show/Gallery