November 12, 2005 - Peter Kramer/Getty Images Entertainment more pics like this »
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11. Matthew Lewis: Neville Longbottom

Matthew Lewis has acted since the age of 5, and won the role of pure-blood Gryffindor student Neville Longbottom at the age of 11. For the part, he wore crooked false teeth and two-sizes-too-big shoes, along with plastic bits behind his ears to make them stick out more.