In honor of the recent Tim Burton film 9 we're spotlighting numerals and numbers in film. What they have contributed to movies over the years goes beyond simply differentiating an original from a sequel.

Brad Pitt was so embarrassed by his performance in movies Cutting Class, Meet Joe Black and Seven Years In Tibet; he's apologized to film critics. He admits some of his roles in the late 1980s and 1990s were not his strongest - and agrees with movie critics who claim his earlier work is not his best.

Rob Lowe was devastated when he turned down the role of Dr. Derek Shepherd in hit TV medical drama Grey's Anatomy, insisting he felt like shooting himself after the show became a hit. Lowe passed on the romantic lead role, which eventually went to Patrick Dempsey - and earned him the nickname Dr. McDreamy - and revived the actor's career.