 Several of the new medium's biggest attractions came from vaudeville and the musical theater, where performers such as Al Jolson, Eddie Cantor, Jeanette MacDonald, and the Marx Brothers were accustomed to the demands of both dialogue and song.James Cagney and Joan Blondell, who had teamed on Broadway, were brought west together by Warner Bros. in 1930.A few actors were major stars during both the silent and the sound eras