Andy James Nicholson (born 9 April 1986) is an English musician, DJ, record producer, and photographer, best known as the original bassist of rock band Arctic Monkeys, which he left in 2006.

[6][7] However, on 20 June 2006, it was announced that he was no longer part of the band,[8] with Alex Turner later stating "we sorta found ourselves in a situation where we wanted to move forward".

In an interview with podcast The Michael Anthony Show, Nicholson told the host that leaving the band that he co-founded was "soul destroying".

Nicholson went on to detail the meeting which ended his time in the band and also painted a vivid picture of life in the years that followed, which included struggles with mental health as well as a new search for identity.

[14] In 2008, Nicholson formed Mongrel, which consisted of himself, Jon McClure of Reverend and the Makers, Babyshambles bassist Drew McConnell and Matt Helders from Arctic Monkeys, as well as London rapper Lowkey from the Poisonous Poets.

In November 2019, along with 34 other musicians, Nicholson signed a letter endorsing the Labour Party leader Jeremy Corbyn in the 2019 UK general election with a call to end austerity.