Claim: The Dark Knight starred Ledger as the Joker.
Evidence: Featuring the DC Comics character Batman , the film is the second part of Nolan 's The Dark Knight Trilogy and a sequel to 2005 's Batman Begins , starring an ensemble cast including Christian Bale , Michael Caine , Heath Ledger , Gary Oldman , Aaron Eckhart , Maggie Gyllenhaal and Morgan Freeman.
In the film , Bruce Wayne/Batman -LRB- Bale -RRB- , James Gordon -LRB- Oldman -RRB- and Harvey Dent -LRB- Eckhart -RRB- form an alliance to dismantle organized crime in Gotham City , but are menaced by a criminal mastermind known as the Joker -LRB- Ledger -RRB- who seeks to undermine Batman 's influence and create chaos.