John Michael Higgins was 55 in Scooby-Doo! Return to Zombie Island when he played the character 'Alan Smithee (voice)'.
That was over 5 years ago in 2019.
Today he is 61, and has starred in 65 movies in total, 2 of those since Scooby-Doo! Return to Zombie Island was released.
In Scooby-Doo! Return to Zombie Island, I think John Michael Higgins looks: