Will Arnett was 36 in Horton Hears a Who! when he played the character 'Vlad (voice)'.
That was over 16 years ago in 2008.
Today he is 54, and has starred in 73 movies in total, 47 of those since Horton Hears a Who! was released.
In Horton Hears a Who!, I think Will Arnett looks: