Robin McLaurin Williams was an American actor and comedian. Known for his improvisational skills and the wide variety of characters he created on the spur of the moment and portrayed on film, in dramas and comedies alike, he is regarded as one of the best comedians of all time. Williams began performing stand-up comedy in San Francisco and Los Angeles during the mid-1970s, and rose to fame playing the alien Mork in the ABC sitcom Mork & Mindy (1978–1982).