Luke O'Nien

Watford

O'Nien joined Watford as an Under-9. Having signed his first professional contract at Vicarage Road in July 2013, he was then called up by the first team to the pre-season friendly tour in Italy after he impressed staff during training. O'Nien was then given the number 32 shirt. He had been an unused substitute on a handful of occasions during the 2013–14 season. He made his Watford debut as an 88th-minute substitute in a 3–0 win at home to Barnsley on 15 March 2014. After the match, O'Nien reacted to his debut against Barnsley, saying 'It was fantastic to get out there, that's what you work towards, and I'll keep on practising'.

Wealdstone (loan)

On 27 March 2014, O'Nien signed a one-month loan deal with Isthmian League Premier Division side Wealdstone. He made his debut as a late substitute in a win over Billericay Town on 31 March 2014, while his first start came three days later on 3 April 2014 in a 3–0 success over East Thurrock United. He ended the season gaining a Ryman Premier Division title medal as Wealdstone won the league. Following his loan spell, on 13 May 2014, O'Nien signed a new one-year deal with the Hornets. He expressed delight over signing a new contract with the club. In August 2014, O'Nien returned to Wealdstone, now a Conference South side, on a season-long loan deal. Following Watford's promotion to the Premier League in 2015, O'Nien was one of three released by the club following the expiration of his contract.

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As of match played 8 September 2026

O'Nien was born in Hemel Hempstead, Hertfordshire. He attended John F Kennedy Catholic School. His father Terry was a professional golfer. Owing to his ancestry, O'Nien is eligible to play international football for either the England or Singapore national teams. His great-uncle is Lim Kim San, a prominent local politician who played a role in the development of Singapore, particularly in the country's prominent public housing projects. O'Nien is married to wife Georgia and has two children, a boy and a girl.

Sunderland

EFL Championship play-offs: 2025 EFL League One play-offs: 2022 EFL Trophy: 2020–21; runner-up: 2018–19 Individual

EFL League One Team of the Season: 2020–21 University of Sunderland: Honorary Doctorate