G4 are a four-piece British vocal troupe who first came to prominence when they finished second in Series 1 of The X Factor in 2004, and are known for their operatic delivery of modern pop songs. Originally a barbershop quartet, the members met at the Guildhall School of Music and Drama, from which the name G4, standing for "Guildhall 4", derives.
G4 Lineup 2004 - 2007
The X Factor (British TV series)
The X Factor is a British reality television music competition, created by Simon Cowell. Premiering on 4 September 2004, it was produced by Fremantle's British entertainment company, Thames, and Cowell's production company Syco Entertainment for ITV, as well as simulcast on Virgin Media One in Ireland. The programme ran for around 445 episodes across fifteen series, each one primarily broadcast late in the year, until its final episode in December 2018. The majority of episodes were presented by Dermot O'Leary, with some exceptions: the first three series were hosted by Kate Thornton; while Caroline Flack and Olly Murs hosted the show for the twelfth series.
Simon Cowell, creator of The X Factor and the second longest-serving judge in the programme's history
Louis Walsh, longest-serving judge on The X Factor in all but two series.
Sharon Osbourne, a judge for the first four series, and then again in 2013, and 2016–17
Dermot O'Leary served the longest as the programme's host from 2007, with a one-year break in 2015
