David Cross was 44 in Alvin and the Chipmunks: The Squeakquel when he played the character 'Ian'.
That was over 14 years ago in 2009.
Today he is 60, and has starred in 91 movies in total, 37 of those since Alvin and the Chipmunks: The Squeakquel was released.
In Alvin and the Chipmunks: The Squeakquel, I think David Cross looks: