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, a role he got after beating out a reported 20,000 children who had auditioned, 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.