Brian Grazer (born July 12, 1951, in Los Angeles, California) is an Academy Award-winning American film and television producer who founded Imagine Entertainment with partner Ron Howard. Together they have produced many acclaimed films, including A Beautiful Mind and Apollo 13.

Grazer also produced the 2002 film 8 Mile, the live-action version of the holiday classic How the Grinch Stole Christmas! (2000), Spike Lee's 2006 crime-thriller Inside Man and American Gangster (2007), which was nominated for two Academy Awards. His producing credits also include the films Changeling and Frost/Nixon. He is the executive producer of 24 and Arrested Development.

Grazer appeared as himself on The Simpsons twice; in "When You Dish Upon a Star", he received movie ideas from Ron Howard, and in "Lost Verizon" where he offered Denis Leary a job offer for Everyone Poops.