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In page Groucho Marx:

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The Marx Brothers became the biggest comedic stars of the Palace Theatre in New York, which billed itself as the "Valhalla of Vaudeville". Brother Chico's deal-making skills resulted in three hit plays on Broadway. No other comedy routine had ever so infected the Broadway circuit. All of this stage work predated their Hollywood career. By the time the Marxes made their first movie, they were already major stars with sharply honed skills; and by the time Groucho was relaunched to stardom in television on You Bet Your Life, he had been performing successfully for half a century.[citation needed]