The Naked Brothers Band: The Movie is a 2005 musical comedy film written and directed by Polly Draper.
The film opens with Nat and Alex introducing themselves and their documentary to the viewers. This is followed by a performance of The Silver Boulders' latest song "Motor Mouth" at the Hammerstein Ballroom.
Nat and Alex explain how the band used to consist of only themselves and was called The Naked Brothers Band (due to being partly naked and being brothers). Their childhood friend Cole was a member of the band as well before he had to move to Connecticut. During Nat's second preschool year, the band was renamed The Silver Boulders, which included Nat's preschool friends David, Josh, and Thomas.
Main article: The Naked Brothers Band: Music from the Movie