How many movies have Groucho Marx and Harpo Marx acted in together?

They have worked on 14 movies together! Their first movie together was The Cocoanuts (1929) while their highest rated movie together was A Night at the Opera (1935). They have not worked together since The Story of Mankind (1957). They are most known for their comedy films together.

Role
S. Quentin Quale
Role
'Rusty' Panello
Role
Attorney J. Cheever Loophole
Role
'Punchy'
Role
Captain Jeffrey T. Spaulding
Role
The Professor