Groucho Marx
Professor Wagstaff

Harpo Marx
Pinky

Chico Marx
Baravelli

Zeppo Marx
Frank Wagstaff

Thelma Todd
Connie Bailey

David Landau
Jennings

Bobby Barber
Speakeasy Patron (uncredited)

Reginald Barlow
Retiring Collage President (uncredited)

Vince Barnett
Speakeasy Patron (uncredited)

Sheila Bromley
Wagstaff's Receptionist (uncredited)

E.H. Calvert
Professor in Wagstaff's Study (uncredited)

Edgar Dearing
Speakeasy Bartender (uncredited)

Robert Greig
Biology Professor (uncredited)

Theresa Harris
Laura (uncredited)

Edward LeSaint
Professor in Wagstaff's Study (uncredited)

Florine McKinney
Peggy Carrington (uncredited)

Nat Pendleton
MacHardie (uncredited)

James Pierce
Ed Mullen (uncredited)

Frank Rice
Doorman at Speakeasy (uncredited)

Syd Saylor
Speakeasy Patron at Slot Machine (uncredited)

Ben Taggart
Police Officer (uncredited)

Phil Tead
Football Broadcaster (uncredited)