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

They have worked on 5 movies together! Their first movie together was The Cocoanuts (1929) while their highest rated movie together was Duck Soup (1933). They have not worked together since Duck Soup (1933). They are most known for their comedy films together.

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Professor Wagstaff
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Frank Wagstaff
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Captain Jeffrey T. Spaulding
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Horatio Jamison