Saturday Night Live is an American late-night live television sketch comedy and variety show created by Lorne Michaels and developed by Dick Ebersol. The show premiered on NBC on October 11, 1975, under the original title NBC's Saturday Night. The show's comedy sketches, which parody contemporary culture and politics, are performed by a large and varying cast of repertory and newer cast members. Each episode is hosted by a celebrity guest, who usually delivers an opening monologue and performs in sketches with the cast, and features performances by a musical guest. An episode normally begins with a cold open sketch that ends with someone breaking character and proclaiming, "Live from New York, it's Saturday Night!", beginning the show proper.
Michaels left the series in 1980 to explore other opportunities. He was replaced by Jean Doumanian, who was replaced by Ebersol after a season of bad reviews. Ebersol ran the show until 1985, when Michaels returned and has remained since. Many of SNL's cast found national stardom while appearing on the show and achieved success in film and television, both in front of and behind the camera. Others associated with the show, such as writers, have gone on to successful careers creating, writing, or starring in TV and film.