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)

Sam Wood

Director

Directing

Lesley Selander

Assistant Director

Directing

Morrie Ryskind

Screenplay

Writing

James Kevin McGuinness

Story

Writing

George S. Kaufman

Screenplay

Writing

Irving Thalberg

Executive Producer

Production

Herbert Stothart

Music

Sound

Douglas Shearer

Sound Director

Sound

Merritt B. Gerstad

Director of Photography

Camera

A. Lindsley Lane

Camera Operator

Camera

William LeVanway

Editor

Editing

Cedric Gibbons

Art Direction

Art