The on-stage personalities of Groucho, Chico, and Harpo were said to have been based on their actual traits. Zeppo, on the other hand, was considered the funniest brother offstage, despite his straight stage roles. He was the youngest and had grown up watching his brothers, so he could fill in for and imitate any of the others when illness kept them from performing. "He was so good as Captain Spaulding "Animal Crackers" that I would have let him play the part indefinitely, if they had allowed me to smoke in the audience," Groucho recalled. (Zeppo stood in for Groucho in the film version of "Animal Crackers". Groucho was unavailable to film the scene in which the Beaugard painting is stolen, so the script was contrived to include a power failure, which allowed Zeppo to play the Spaulding part in near-darkness.) In December 1917 the Marx brothers were noted in an advertisement playing in a musical comedy act "Home Again".