A Night at the Opera

Groucho Marx Otis B. Driftwood

Chico Marx Fiorello

Harpo Marx Tomasso

Kitty Carlisle Rosa

Allan Jones Ricardo Barroni

Sig Ruman Gottlieb

Walter Woolf King Lassparri

Robert Emmett O'Connor Henderson

Margaret Dumont Mrs. Claypool

Edward Keane Captain

Evelyn Selbie The Fortune Teller in 'Trovatore' (uncredited)

Purnell Pratt The Mayor of New York (uncredited)