Andy James Nicholson is an English musician, best known as the original bassist of the rock band Arctic Monkeys, which he left in 2006. In 2008, he founded Mongrel with Jon McClure of Reverend and the Makers. In 2009, he became the bassist for ex-Milburn frontman Joe Carnall's band The Book Club, but left later that year to join Reverend and the Makers. He is currently producing and performing in the hip-hop group Clubs & Spades with Maticmouth from Reverend Soundsystem.