Matt Lewis, Evanna Lynch launch balloon HBP DVD contest

Potter actors Evanna Lynch (Luna Lovegood) and Matthew Lewis (Neville Longbottom) released 1,000 balloons on Millennium Bridge in London today to celebrate the upcoming Half-Blood Prince DVD release and to kick off a new contest. The contest, open to anyone 18 or older in the UK, is simple: find one of the black balloons Evanna and Matthew launched today and follow the instructions on the attached card. You'll then be entered into a contest where the winner will receive a trip to the Deathly Hallows set where they'll be turned into a painting! This is London has video from the balloon launch, which also includes a nice interview with the two actors. They note that Deathly Hallows is going to be "insane" and Evanna reveals that the producers are keeping it true to the book and paying a lot of attention to the final battle. Photos from the event can be seen here on Getty.