<Li> Ewan McGregor as Rodney Copperbottom, a young blue robot and aspiring inventor . </Li> <Li> Halle Berry as Cappy, a human - themed worker at Bigweld Industries and Rodney's love interest . </Li> <Li> Robin Williams as Fender Pinwheeler, a red robot who befriends Rodney and is constantly falling apart . </Li> <Li> Mel Brooks as Bigweld, the jolly inventor and owner of Bigweld Industries; until Rodney met him, Bigweld had slipped into depression at Madame Gasket's actions . </Li>

Who does the voice of fender in robots