Andrew Ralph Adamson, MNZM (born 1 December 1966) is a New Zealand film director, producer and screenwriter based mainly in Los Angeles, California, U.S., where he made the blockbuster animation films, Shrek and Shrek 2 for which he received an Academy Award nomination. He was director, executive producer, and scriptwriter for C. S. Lewis' The Lion, the Witch, and the Wardrobe. Shooting took place in New Zealand, primarily in and around Auckland, but also in South Island where much of Peter Jackson's The Lord of the Rings trilogy was filmed. He also worked on the movies Batman Forever and Batman & Robin as a visual effects supervisor.

He was made a Member of the New Zealand Order of Merit in the 2006 Queen's Birthday Honours List.