Heath Ledger As Tony In "The Imaginarium Of Doctor Parnassus", Replaced By Johnny Depp, Colin Farrell And Jude Law
To replace the talent that is Heath Ledger, three actors had to portray the character of Tony in The Imaginarium of Doctor Parnassus. With Heath Ledger passing away, leaving a part of the movie unfilmed, Depp, Farrell, and Law portrayed Tony in a way that highlights the story. Ultimately, the movie is a tribute to Heath Ledger.
Also, how would anyone be able to tell when some background character in GoT was replaced? There were a ton of them, and they all looked the same.