Jesse McCartney was 23 in Alvin and the Chipmunks: Chipwrecked when he played the character 'Theodore (voice)'.
That was over 12 years ago in 2011.
Today he is 37, and has starred in 28 movies in total, 13 of those since Alvin and the Chipmunks: Chipwrecked was released.
In Alvin and the Chipmunks: Chipwrecked, I think Jesse McCartney looks: