Alamy Dominic Cooper in 'Mamma Mia!' (2008). Chris Jackson/Getty Sam Heughan attends the 2010 British Soap Awards on May 8, 2010 in London, England.

Our first look at HBO's new Harry Potter actor in costume has been released, as filming begins on the series. A behind-the-scenes production photo, published today, shows 11-year-old actor Dominic ...