Saturday Night Live (SNL) is an American late-night live sketch comedy variety show created by Lorne Michaels and developed by Michaels and Dick Ebersol that airs on NBC. The show's premiere was hosted by George Carlin on NBC on October 11, 1975, under the original title NBC's Saturday Night. The show's comedy sketches, which often parody popular 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 and broadcast live with a studio audience. The host usually delivers a monologue toward the start of the show and then performs in sketches with the cast, and introduces featured performances by a musical guest. An episode normally begins with a cold open sketch that is usually based on current political events and ends with someone breaking character and proclaiming, "Live from New York, it's Saturday Night!", before moving to credits and introduction of the guest host.
In 1980, Michaels left the show to explore other opportunities. He was replaced by Jean Doumanian, who was then replaced by Ebersol after a season of bad reviews. Ebersol ran the show until 1985, when Michaels returned. Since then, Michaels has served as showrunner. Many SNL cast members have 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, and starring in television and film.