Greig Stewart was a twenty seven year old musician from Series 6 of Britain's Got Talent. He was a laser harpist, who made the semi finals. He worked as a software developer.
In his audition he played the music to Tetris on a laser harp. David Walliams commented 'You are the best laser harpist we've ever had on [BGT].' Amanda Holden added 'It was a little bit nerdy.' He advanced through to the following round with four yesses, and later to the semi finals.
He competed in semi final five, and he also got buzzed by Simon Cowell, and Amanda Holden. In the semi finals he once again played his laser harp to a medley of songs including Cars by Gary Numan, and Summer by Calvin Harris. He was eliminated at the end of semi final 5.