Airing on NBC since 1975, SNL is the longest late night comedy sketch show in broadcast history. With a regular cast of comedians, the show is hosted by a different celebrity and musical guest every week. Together these two combinations bring hilarious comedy skits to Saturday nights. SNL has seen many actors host its show, and many now-famous actors such as John Belushi, Dan Aykroyd, Gilda Radner, Eddie Murphy, Julia Louis-Dreyfus, Martin Short, Jimmy Fallon, Robert Downey Jr, and many more, all started out on Saturday Night Live before moving on to stardom. Some of SNL's most famous sketches have been quoted time and again.