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