The Creative Artists Agency represents Heath Ledger .
It is often cited as the world 's leading talent agencyWilliam Morris and Endeavor set to form new talent agency powerhouse and its clients include Heath Ledger , George Clooney , Meryl Streep , Brad Pitt , Lebron James , Carmelo Anthony , Sandra Bullock , Oprah Winfrey , Julia Roberts , Steven Spielberg , Will Smith , Novak Djokovic , and Reese Witherspoon .