The Dark Knight is a 2008 superhero film directed by Christopher Nolan and based on the DC Comics character Batman. The film is the second installment in Nolan's Batman trilogy and stars Christian Bale as Batman, alongside Heath Ledger as the Joker. The Dark Knight follows Batman's efforts to combat the Joker, a psychopathic criminal mastermind who wreaks havoc on Gotham City. The film explores themes of chaos, morality, and the blurred line between heroism and vigilantism. The Dark Knight received widespread critical acclaim for its dark and gritty tone, complex characters, and Ledger's haunting portrayal of the Joker. The film was a box office success, grossing over $1 billion worldwide.