Professor Wagstaff
Groucho Marx
Pinky
Harpo Marx
Professor in Wagstaff's Study (uncredited)
E.H. Calvert
Speakeasy Bartender (uncredited)
Edgar Dearing
Biology Professor (uncredited)
Robert Greig
Laura (uncredited)
Theresa Harris
Edward LeSaint
Peggy Carrington (uncredited)
Florine McKinney
MacHardie (uncredited)
Nat Pendleton
Ed Mullen (uncredited)
James Pierce
Doorman at Speakeasy (uncredited)
Frank Rice
Speakeasy Patron at Slot Machine (uncredited)
Syd Saylor
Baravelli
Chico Marx
Typing Sportswriter (uncredited)
Arthur Sheekman
Police Officer (uncredited)
Ben Taggart
Football Broadcaster (uncredited)
Phil Tead
Frank Wagstaff
Zeppo Marx
Connie Bailey
Thelma Todd
Jennings
David Landau
Speakeasy Patron (uncredited)
Bobby Barber
Retiring Collage President (uncredited)
Reginald Barlow
Vince Barnett
Wagstaff's Receptionist (uncredited)
Sheila Bromley
Director
Norman Z. McLeod
Producer
Herman J. Mankiewicz
Screenplay
Harry Ruby
Bert Kalmar
Director of Photography
Ray June
S.J. Perelman
Will B. Johnstone
Lyricist
Original Music Composer