The Lorax (also known as Dr. Seuss' The Lorax) is a 2012 American animated musical fantasy comedy film produced by Illumination Entertainment and distributed by Universal Pictures. It is the second screen adaptation of Dr. Seuss' 1971 children's book of the same name following the 1972 animated television special. It was directed by Chris Renaud, co-directed by Kyle Balda (in his feature directorial debut), and produced by Chris Meledandri and Janet Healy, from a screenplay written by the writing team of Cinco Paul and Ken Daurio. Paul and Daurio also served as executive producers alongside Dr. Seuss' widow Audrey Geisel. Starring the voices of Danny DeVito, Ed Helms, Zac Efron, Taylor Swift, Rob Riggle, Jenny Slate, and Betty White, the film builds on the book by expanding the story of the Lorax and Ted, the previously unnamed boy who visits the Once-ler.

The idea for the film was initiated by Geisel, who had an established partnership with Meledandri from a collaboration on Horton Hears a Who! (2008). Geisel approached Meledandri with the idea when he launched Illumination. The film was officially announced in 2009 with the creative team attached, and by 2010, DeVito was cast as the titular character. John Powell composed the score, and also wrote the film's songs alongside Paul. The animation was produced by French studio Illumination Mac Guff, which was the animation department of Mac Guff that was later acquired by Illumination in 2011.

The Lorax had its world premiere at Universal Studios in Hollywood on February 19, 2012, and was theatrically released in the United States on March 2. It received mixed reviews from critics, who praised its animation, musical score, and voice acting, but criticized its characters and story; it also received backlash for its marketing, noting its contradictions to the book's message. Despite this, it was a commercial success, grossing $351 million worldwide against a $70 million budget.