James Daniel Guy Hearn (born 19 June 1976 in Denham, Buckinghamshire, England) is an English singer-songwriter. He is best known as being the vocalist of boyband Ultra.
Hearn had met Ultra's guitarist, Mike Harwood and drummer, Jon O'Mahony, respectively, at school. He was in the same class as Harwood, and O'Mahony was a couple of years older. Hearn went on to study Geography and Management at the University of Leeds, graduating in 1999. He was once a pentathlon athlete, but realized that sport was not the highest-paid career choice, and turned to music.
In 1997, Hearn, Harwood, O'Mahony, and Nick Keynes, formed Ultra and released their self-titled debut album in 1999, for which Hearn wrote most of the songs. He left the band and worked as a surveyor before he earned a master's degree from the University of Reading. Ultra reunited in 2005 and released a second album, The Sun Shines Brighter. Hearn subsequently left the music business and now works in wealth management at a London investment bank.