Scott Alexander
Self
Robert S. Bader
Self
F.X. Feeney
Self
Larry Karaszewski
Self
Leonard Maltin
Self
David Mandel
Self
Bill Marx
Self
Anthony Slide
Self
Steve Stoliar
Self
Jeffrey Vance
Self
Groucho Marx
Self (archive footage)
Chico Marx
Self (archive footage)
Harpo Marx
Self (archive footage)
Zeppo Marx
Self (archive footage)