American Chopper: The Series is a Learning Channel reality television series produced by Pilgrim Films & Television Inc. The popular series is based around the founder of the company, Paul Teutul, Sr., and his son, Paul Teutul, Jr., also known as Paulie or simply Junior, as the two run a business creating custom motorcycles in their workshop, Orange County Choppers. The workshop is based in Montgomery, New York.

The contrasting attitudes of the men and their propensity for sulking often lead to fiery but humorous verbal exchanges as they meet unusually short schedule deadlines for building distinct custom choppers.

Originally a show on the Discovery Channel, the series moved to Discovery's sister channel, TLC, on December 28, 2006, starting off with an 18-hour marathon. Its first season on TLC premiered on January 18, 2007.

Main cast with Brazilian President Luís Inácio Lula da Silva and First Lady Marisa Letícia.

Vinnie (left) and Mikey filming at an outside location.

Typically Paul Jr. works alongside fabricators and mechanics such as Rick Petko, Nick Hansford, Christian Welter, and former employees Vinnie DiMartino (who left OCC to start V-Force Customs in 2007) and Cody Connelly (a BOCES student intern who has joined DiMartino's business), to create dozens of custom motorbikes. Paul Sr. supervises the builds and has built motorcycles himself. Michael Teutul, commonly referred to as Mikey, serves as the shop's custodian and webmaster, and provides comic relief to the show. He has been seen doing metal work occasionally, as one of his early jobs was working at Orange County Ironworks.

The show also documents their personal and promotional activities ranging from magazine photo shoots to family holidays and custom bike shows.