Nat & Alex Wolff (previously known as The Silver Boulders and The Naked Brothers Band) are an American rock-music duo from New York, New York, consisting of brothers Nat and Alex Wolff. The siblings are known for their work on the Nickelodeon television series The Naked Brothers Band, which was created and produced by their mother actress Polly Draper. It was adapted by a self-titled mockumentary film that Draper wrote and directed. The duo's initial teen pop band called The Naked Brothers Band was depicted as part of its participation in their Nickelodeon series that aired from 2007 to 2009.