Born: October 19, 1940
Famous for: Making sure Harry Potter learns his lessons properly at Hogwarts School for Wizards
To describe Michael Gambon as one of the world's finest actors would be no exaggeration. The Dublin-born star is revered in dramatic circles for the consistently high standard of his performances. Over the past four decades he has become a leading light on the stage, television and the big screen. His film credits include A Dry White Season, Gosford Park and, of course, The Harry Potter series.