Inglourious Basterds is a 2009 war film written and directed by Quentin Tarantino. It stars an ensemble cast including Brad Pitt, Christoph Waltz, Michael Fassbender, Eli Roth, Diane Kruger, Daniel Brühl, Til Schweiger and Mélanie Laurent. The film tells an alternate history story of two converging plots to assassinate Nazi Germany's leadership at a Paris cinema—one through a British operation largely carried out by a team of Jewish American soldiers led by First Lieutenant Aldo Raine (Pitt), and another by French Jewish cinema proprietor Shosanna Dreyfus (Laurent) who seeks to avenge her murdered family. Both are faced against Hans Landa (Waltz), an SS colonel with a fearsome reputation for hunting Jews.

The title (but not the story) was inspired by Italian director Enzo G. Castellari's 1978 Euro War film The Inglorious Bastards, but deliberately misspelled as "a Basquiat-esque touch". Tarantino wrote the script in 1998, but struggled with the ending and chose instead to direct the two-part film Kill Bill. After co-directing Death Proof in 2007, Tarantino returned to work on Inglourious Basterds. A co-production between the United States and Germany, the film began principal photography in October 2008 and was filmed in Germany and France with a $70 million production budget.

Inglourious Basterds premiered on May 20, 2009, at the 62nd Cannes Film Festival, and received a wide release in theaters in Germany on August 20, and in the United States on August 21. The Weinstein Company distributed the film in the United States, while Universal Pictures handled international distribution. It was a commercial success, grossing $321.5 million worldwide, becoming Tarantino's highest-grossing film to that point, until it was surpassed by Django Unchained (2012). The film received critical acclaim, with Waltz's performance as Hans Landa being singled out for praise, but some criticized the historical liberties taken. It also won multiple awards and nominations, among them eight Academy Award nominations (including Best Picture, Best Director and Best Original Screenplay). For his role as Landa, Waltz won the Cannes Film Festival's Best Actor Award, as well as the BAFTA, Screen Actors Guild, Critics' Choice, Golden Globe, and Academy Award for Best Supporting Actor.