Joshua Mostel is an American actor with numerous film and Broadway credits. The son of Zero Mostel, he is best known for his supporting roles in films such as Jesus Christ Superstar (1973), Harry and Tonto (1974), Sophie's Choice (1982), City Slickers (1991), Billy Madison (1995), and Big Daddy (1999).

Samuel Joel "Zero" Mostel was an American actor, comedian, and singer. He is best known for his portrayal of comic characters such as Tevye on stage in Fiddler on the Roof, Pseudolus on stage and on screen in A Funny Thing Happened on the Way to the Forum, and Max Bialystock in the original film version of Mel Brooks' The Producers (1967). Mostel was a student of Don Richardson, and he used an acting technique based on muscle memory. He was blacklisted during the 1950s; his testimony before the House Un-American Activities Committee was well publicised. Mostel later starred in the Hollywood Blacklist drama film The Front (1976) alongside Woody Allen, for which Mostel was nominated for the British Academy Film Award for Best Supporting Actor.