Frank Welker was 56 in Looney Tunes: Back in Action when he played the character 'Scooby-Doo (voice)'.
That was over 21 years ago in 2003.
Today he is 78, and has starred in 386 movies in total, 140 of those since Looney Tunes: Back in Action was released.
In Looney Tunes: Back in Action, I think Frank Welker looks: