Horse Feathers

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)