Frank Welker was 63 in Scooby-Doo! Curse of the Lake Monster when he played the character 'Scooby-Doo (voice)'.
That was over 14 years ago in 2010.
Today he is 78, and has starred in 386 movies in total, 76 of those since Scooby-Doo! Curse of the Lake Monster was released.
In Scooby-Doo! Curse of the Lake Monster, I think Frank Welker looks: