Robbie Amell was 20 in Scooby-Doo! The Mystery Begins when he played the character 'Fred'.
That was over 15 years ago in 2009.
Today he is 36, and has starred in 26 movies in total, 19 of those since Scooby-Doo! The Mystery Begins was released.
In Scooby-Doo! The Mystery Begins, I think Robbie Amell looks: