The Blues Brothers is a 1980 American musical action comedy film directed by John Landis. It stars John Belushi as "Joliet" Jake Blues and Dan Aykroyd as his brother Elwood, characters developed from the recurring musical sketch "The Blues Brothers" on NBC's variety series Saturday Night Live. The script is set in and around Chicago, Illinois, where it was filmed, and the screenplay is by Aykroyd and Landis. It features musical numbers by rhythm and blues (R&B), soul, and blues singers James Brown, Cab Calloway (in his final feature film role), Aretha Franklin, Ray Charles, Chaka Khan, and John Lee Hooker. It features non-musical supporting performances by Carrie Fisher, Henry Gibson, Charles Napier, Kathleen Freeman, and John Candy.

The story is a tale of redemption for paroled convict Jake and his blood brother Elwood, who set out on "a mission from God" to prevent the foreclosure of the Roman Catholic orphanage in which they were raised. To do so, they must reunite their R&B band and organize a performance to earn the $5,000 needed to pay the orphanage's property tax bill. Along the way, they are targeted by a homicidal "mystery woman", neo-Nazis, and a country and western band—all while being relentlessly pursued by the police.

Universal Studios, which won the bidding war for the film, was hoping to take advantage of Belushi's popularity in the wake of Saturday Night Live, the film Animal House, and The Blues Brothers' musical success; it soon found itself unable to control production costs. The start of filming was delayed when Aykroyd, who was new to film screenwriting, took six months to deliver a long and unconventional script that Landis had to rewrite before production, which began without a final budget. On location in Chicago, Belushi's partying and drug use caused lengthy and costly delays that, along with the destructive car chases depicted onscreen, made the film one of the most expensive comedies ever produced.

Due to concerns that the film would fail, its initial bookings were less than half of those similar films normally received. Released in the United States on June 20, 1980, it received mostly positive reviews from critics and grossed over $115 million in theaters worldwide before its release on home video, and has become a cult classic over the years. A sequel, Blues Brothers 2000, was released in 1998 to critical and commercial failure. In 2020, The Blues Brothers was selected for preservation in the United States National Film Registry by the Library of Congress as "culturally, historically, or aesthetically significant".