Manchester City 2018–2020 From
Stockport, Harwood-Bellis started playing with Manchester City from the age of six. He came through the same Stockport Metro Junior League that produced City team-mate
Phil Foden. Harwood-Bellis formed a centre-back partnership with
Eric Garcia as part of the City youth side that made it to the
FA Youth Cup final in 2019. On 24 September 2019, Harwood-Bellis made his professional debut when he was named in the starting line up for Manchester City's
EFL Cup tie away against
Preston North End. He made his second appearance for City and his debut in European competitions with his 82nd-minute introduction during a 4–1 victory over
Dinamo Zagreb in the
Champions League group stage on 11 December 2019. On 4 January 2020, Harwood-Bellis scored his first goal for Manchester City in a 4–1 win against
Port Vale in the
FA Cup. On 7 December 2020, Harwood-Bellis signed a four-year contract extension, keeping him at the club until 2024.
Blackburn Rovers and Anderlecht loans On 1 February 2021, Harwood-Bellis joined
Championship side
Blackburn Rovers on loan for the remainder of the 2020–21 season. Five days later, he made his debut for Blackburn as a substitute for
Ryan Nyambe in a 1–0 away league defeat by
Queens Park Rangers. On 27 June, Harwood-Bellis joined
Belgian First Division A side
Anderlecht on a season-long loan deal.
Stoke City (loan) On 11 January 2022, Harwood-Bellis joined
Championship side
Stoke City on loan until the end of the
2021–22 season. Harwood-Bellis was a regular in the side for the remainder of the season, playing 24 times as Stoke finished in 14th position. He scored his first goal for the club on 13 September in a 1–1 draw against
Preston North End. On 31 May 2023, he returned to his parent club, Manchester City, upon expiration of his loan.
Southampton On 1 September 2023, Harwood-Bellis joined Championship side
Southampton on a season-long loan with an obligation to buy for £20 million, if the club are promoted to the Premier League. He made his debut on 15 September 2023 in a 4–1 defeat to
Leicester City. On 28 October 2023, Harwood-Bellis scored his first goal for the club in a 3–1 victory against
Birmingham City. He started for Southampton in their
Championship play-off final win against
Leeds United. with the move effective from 1 July when he signed a four-year contract. On 17 August 2024, Harwood-Bellis made his first
Premier League appearance in a 1–0 away defeat against
Newcastle United. He scored his first Premier League goal on 30 September 2024 in a 3–1 defeat against
AFC Bournemouth. ==International career==