Thumbsucker is the soundtrack to the film of the same name, which is based on the novel of the same name by Walter Kirn. It was released on September 13 2005 under the Hollywood Records label. It was originally intended to be created by Elliott Smith, but upon his passing The Polyphonic Spree was chosen to complete it when director Mike Mills attended a performance of theirs and was impressed.

Thumbsucker is a 2005 film directed by Mike Mills adapted from the Walter Kirn novel of the same name. The movie focuses on teenager Justin Cobb (Lou Pucci) and how he copes with his thumbsucking problem, and his experiments with hypnosis, sex and drugs.