Bill Cosby and Roman Polanski have been expelled from the US Academy of Motion Picture Arts and Sciences.
The academy - which runs the Oscars - said this was done in accordance with its standards of conduct.
TV star Cosby was convicted of sexual assault last month.
Oscar-winning director Polanski admitted statutory rape of a 13-year-old girl in 1977.
Neither Cosby nor Polanski has publicly reacted to the academy's decision.