Let me see...
James Marsters (Spike from BtvS and AtS)
David Boreanaz (Angel from BtvS and AtS)
Alyson Hannigan (Willow from BtvS and AtS, American Pie movies)
Hugh Jackman (X-men)
Anna Paquin (X-men)
(X-men is never wrong!)
Craig Parker (Lord of the Rings)
Gary Oldman (Harry Potter, Bram Stoker's Dracula...)
Daniel Radcliffe (Harry Potter)
Emma Watson (Harry Potter)
Tom Felton (Harry Potter)
Alan Rickman (Harry Potter)
(Would go great with the new HP movie, hehe)