TV star Bill Cosby and Oscar-winning director Roman Polanski have been expelled from the US Academy of Motion Picture Arts and Sciences.<br /> In a statement released on Thursday, the group behind the Academy Awards said its decision was in accordance with the organization's Standards of Conduct.<br />Cosby was found guilty of sex crimes last week. <br />Polanski admitted to having unlawful sex with a 13-year-old girl in 1977. <br />
