Mason Gamble, towheaded title star of 1993’s John Hughes-scripted Dennis the Menace, looks back menacingly in a still from the big screen kid comedy. Like the late ’50s/early ’60s TV show, the hit Warner Bros. release was adapted from Hank Ketcham’s long-running comic strip. Gamble’s child actor credits also include a role in Wes Anderson’s Rushmore. The Illinois native put his acting job aside, went to UCLA and became a marine biologist. Photo: Marsha Blackburn.