Colin Farrell is one of three actors tapped to take on Heath Ledger's final role in "The Imaginarium of Dr. Parnassus." Colin says he accepted the role as a tribute to Heath. "It's about getting Heath's work out there. He's too good for any of his work not to be seen," Colin tells Sydney's Daily Telegraph. "It makes me feel uncomfortable to think about it too much but it's an incredibly painful honor to have, you know, and an honor I wish wasn't bestowed, but an honor nonetheless." Johnny Depp and Jude Law are the other two actors who will take over playing Tony, Heath's character, when he steps through a magic mirror into an alternate reality at several different points in the film.