He grew up, mostly, in Croydon,[1] and began making music at the age of seven when he played the recorder,[1] piano,[2] and flute.

He studied theology at King's College London, but put his degree on hold, to pursue his music career with JLS.

[1] The group auditioned for The X Factor in 2008,[1] managed by Louis Walsh, and finished runners-up behind Alexandra Burke.

[3] In 2014, Gill sang on a song titled "Best Night OML" produced by Charlie Hedges.

[9] In August 2024, twelve years after winning the Christmas special, Gill was announced as a contestant on the twenty-second series of Strictly Come Dancing.

He then re-partnered with Lauren Oakley from week 7 onwards, after Dowden fell ill and later withdrew due to injury.

[10] The pair ultimately reached the final, finishing as runners-up behind Chris McCausland and his partner Dianne Buswell.