Not to mention the excellent soundtracks for A Night at the Opera and A Day at the Races by Freddie Mercury and company. RjLesch
Their father, I seem to recall, appeared as Gummo -- but was this in vaudeville or the plays? I don't think he's evern in the movies.
Gummo was a brother (the oldest, perhaps); he was on stage, but bowed out before they did any movies. Worth mentioning, though. Groucho later said that he thought Gummo was the funniest one of them all. RjLesch
Someone should try and paraphrase David Thomson on the Marx Brothers. Really quite extraordinary analysis.