Mason Wilson Gamble (born January 16, 1986) is an American actor known for his portrayal of Dennis Mitchell in the 1993 film Dennis the Menace and as Jason Schwartzman's sidekick, Dirk Calloway, in Wes Anderson and Owen Wilson's critically acclaimed 1998 film Rushmore. He also appeared in Anya's Bell with Della Reese, starring as a dyslexic boy. In 1999, Gamble portrayed Brady Lang in the thriller Arlington Road. He had a featured role in the short-lived 2001 CBS drama Kate Brasher. Additionally, he had a small role as McCluckey in the 1996 comedy Spy Hard. Gamble was born in Chicago, Illinois, the son of Sally and Tim Gamble, an actor. He graduated from Oak Park and River Forest High School's class of 2004. He attended UCLA Dentistry program and graduated in 2008. He was member of the Pi Kappa Alpha Fraternity at UCLA.