Alvin and the Chipmunks is a 2007 American live-action/animated musical comedy film directed by Tim Hill from a screenplay by Jon Vitti and the writing team of Will McRobb and Chris Viscardi. It is the first installment in the live-action film series of Alvin and the Chipmunks. The plot follows chipmunks Alvin, Simon, and Theodore, who move in with struggling songwriter Dave Seville after losing their home. When Dave discovers their singing talent, he introduces them to JETT Records executive Ian Hawke, whose plans threaten the chipmunks' newfound family dynamic. The cast includes Jason Lee, David Cross, and Cameron Richardson, with voices by Justin Long, Matthew Gray Gubler and Jesse McCartney.

Development began in 1997 when Ross Bagdasarian Jr. expressed interest in creating a live-action film. The project saw multiple changes before it was officially announced in September 2004 as a collaboration between Fox 2000 Pictures, 20th Century Fox Animation, and Bagdasarian Productions. The animation for the film was handled by Rhythm & Hues Studios, which studied real chipmunks and previous versions of the characters to design CGI models that retained the original essence. The integration of CGI with live-action footage required match-moving techniques and advanced visual effects software. The music was composed by Christopher Lennertz. The film is dedicated in the memory of Ross Bagdasarian, creator of the Chipmunks.

Alvin and the Chipmunks was released in the United States on December 14, 2007, by 20th Century Fox. The film received generally negative reviews from critics, who criticized the film's humor and "rehashed kids' movie formula", while Cross' performance as the villain received general praise. It grossed $361.3 million worldwide against a $60 million budget and was the third best-selling DVD of 2008 in the United States. The film was followed by three sequels: Alvin and the Chipmunks: The Squeakquel (2009), Alvin and the Chipmunks: Chipwrecked (2011), and Alvin and the Chipmunks: The Road Chip (2015).