Shrek the Third (also known as Shrek 3) is a 2007 American animated fantasy comedy film loosely based on the 1990 children's picture book Shrek! by William Steig. Directed by Chris Miller and co-directed by Raman Hui from a screenplay by Jeffrey Price, Peter S. Seaman, Miller, and producer Aron Warner, and a story conceived by Andrew Adamson, co-director of the previous two installments, it is the sequel to Shrek 2 (2004) and the third installment in the Shrek film series. The film features Mike Myers, Eddie Murphy, Cameron Diaz, Antonio Banderas, Rupert Everett, Julie Andrews, and John Cleese reprising their voice roles from the previous films, along with new additions Justin Timberlake as Arthur Pendragon and Eric Idle as Merlin. In the film, Prince Charming is plotting to overthrow Shrek and Fiona, who have inherited the throne following King Harold's death. Shrek has no interest in ruling the kingdom and attempts to convince Fiona's underachieving 16-year-old cousin Artie to reign instead.

Shrek the Third premiered at the Mann Village Theatre, Westwood in Los Angeles on May 6, 2007, and was theatrically released in the United States by Paramount Pictures on May 18, 2007. Despite mixed reviews, the film was a commercial success, grossing $813 million worldwide on a budget of $160 million, becoming the fourth-highest-grossing film of 2007. It was nominated for the Best Animated Film at the 61st British Academy Film Awards. The sequel, Shrek Forever After, was released on May 21, 2010.