More on Margaret Dumont from Infoplease:

• The Gleaners and I (Les Glaneurs et la Glaneuse) - Starring Bodan Litnanski, Agnes Varda, Francois Wertheimer, Margaret Dumont, Virginia Grey
• A Day at the Races - Starring Groucho Marx, Chico Marx, Harpo Marx, Allan Jones, Maureen O'Sullivan
• Duck Soup (1933) - Starring Groucho Marx, Harpo Marx, Chico Marx, Zeppo Marx, Margaret Dumont
• Groucho Marx - Biography of Groucho Marx, The mustachioed leader of the Marx Brothers
• What A Way to Go! - Starring Shirley MacLaine, Paul Newman, Robert Mitchum, Dean Martin, Gene Kelly