Jack McBrayer was 37 in Phineas and Ferb: The Movie: Across the 2nd Dimension when he played the character 'Irving (voice)'.
That was over 13 years ago in 2011.
Today he is 50, and has starred in 42 movies in total, 25 of those since Phineas and Ferb: The Movie: Across the 2nd Dimension was released.
In Phineas and Ferb: The Movie: Across the 2nd Dimension, I think Jack McBrayer looks: