Sean Astin [The Goonies, LoTR Trilogy, Toy Soldiers and stuff]
Viggo Mortensen [28 Days, LoTR Trilogy, Otherstuff]
Rupert Grint [Harry Potter 1 & 2, Thunderpants]
Elijah Wood [Lord of the Rings Trilogy, the Faculty, a million others]
Tom Welling [Smallville]
Gregory Smith [Everwood, The Patriot]
David Gallagher [7th heaven, Richie Rich's Christmas (or somethign like that), others]