Robin McLaurin Williams (July 21, 1951 – August 11, 2014) was an American actor and comedian. Starting as a stand-up comedian in San Francisco and Los Angeles in the mid-1970s, he is credited with leading San Francisco's comedy renaissance. After rising to fame as Mork in the sitcom Mork & Mindy (1978–82), he went on to establish a career in both stand-up comedy and feature film acting. He was known for his improvisational skills.
John Joseph Travolta (born February 18, 1954) is an American actor, film producer, dancer, and singer. Travolta first became known in the 1970s, after appearing on the television series Welcome Back, Kotter (1975–1979) and starring in the box office successes Saturday Night Fever (1977) and Grease (1978). His acting career declined through the 1980s, but enjoyed a resurgence in the 1990s with his role in Pulp Fiction (1994), and he has since starred in films such as Face/Off (1997), Swordfish (2001), Wild Hogs, and Hairspray (both 2007).