Saturday Night, in select theaters Sept. 27 and in wider release on Oct. 11, dramatizes the story of the chaotic 90 minutes before the first episode of what would become Saturday Night Live. The landmark comedy show, which began airing on Oct. 11, 1975, was dreamed up by Lorne Michaels, who remains at the helm heading into its 50th year and is played on-screen by The Fabelmans breakout Gabriel LaBelle.