John Elmer \"Jack\" Carson was a Canadian-born American-based film actor.
Carson was one of the most popular character actors during the \"golden age of Hollywood\", with a film career spanning the 1930s, '40s and '50s. Though he was primarily used in supporting roles for comic relief, his work in films such as Mildred Pierce and Cat on a Hot Tin Roof displayed his mastery of \"straight\" dramatic actor roles as well. He worked for RKO and MGM, but most of his memorable work was for Warner Brothers. His trademark character was the wisecracking know-it-all, typically and inevitably undone by his own smug cockiness.