Nick Walker (born 1969) is an established graffiti artist originating from Bristol, England.
He is credited with being part of the stencil graffiti movement that Robert del Naja had started in the 1980s, which was also an influence on Banksy.
Walker was invited by film director Stanley Kubrick to recreate the graffiti's streets of New York for his 1999 film, Eyes Wide Shut.
His paintings often feature a bowler-hatted gentleman 'vandal', which featured in a video by The Black Eyed Peas.
Walker's paintings now sell for large sums of money - in 2006 a spray painted work titled "Moona Lisa" sold for an unexpected £54,000 at Bonhams in London.
At a solo exhibition at London's Black Rat Gallery in 2008, £750,000 worth of art was sold, with dozens of people camping outside the gallery overnight.
Walker was a main participant in the 2011 See No Evil event in Bristol, where he painted one of his bowler-hatted gentleman on the side of a tower block in Nelson Street.