Weissmuller also worked with Lucas when he played a Chrome Robot in the 1971 film THX 1138 and was credited as "Badass #1" in the 1973 film American Graffiti.
His father, Johnny Weissmuller Sr., is best known for his portrayal of Tarzan in twelve films made between 1932 and 1948. The senior Weissmuller's performance originated the Tarzan yell, which Chewbacca gave in Return of the Jedi.