7-11 years old in the cartoons. In the squeakquel they go to a combined middle school and high school so about 11ish.
The chipmunks are around 7-10 in the cartoon series. In the CGI films they're around 9-11 (based on the time between each film) and go to a school that is a combined middle school and high school (I...
In the late 1980s and early 1990s, when Ross Jr. created them, They were about five. Right now in 2010, I would say they would be 10 or up to 15.
zero years old
about 50 years old ANSWER: Alvin is 15 Simon is 16 and Theodore is 14