After Ledger died tragically before shooting on the film was complete, it was announced Farrell, Johnny Depp and Jude Law would all step in to the role to help finish the project.
In an interview with Australia's The Daily Telegraph, Farrell said it wasn't an easy decision, but one he wanted to make to honor Ledger.
"It makes me feel uncomfortable to think about it too much and to get into it really here, but it's an incredibly painful honor to have, you know, and an honor I wish wasn't bestowed but an honor none-the-less," Farrell told The Daily Telegraph.
While Ledger had began filming the role of Tony in the movie, his three fellow actors will each step in to finish the uncompleted scenes.
In the film, Christopher Plummer plays the impresario Doctor Parnassus, and Ledger had taken the role of a mysterious outsider who joins the Doctor's troupe on a quest through parallel worlds to save the doctor's daughter (Lily Cole) from the clutches of the devil (Tom Waits).
Lara's Wardrobe Cam
Test Your Knowledge
Fresh News, Photos, Tunes and More
Demi Moore, RuPaul, Palin...lots more
Photos: Sexiest Magazine Covers





Colin Farrell
Jude Law
Shia LaBeouf
Steve-O
Brandon Davis