Matthew Sean O'Riley (born 21 November 2000) is a professional footballer who plays as an attacking midfielder for Premier League club Brighton & Hove Albion. Born in England, he plays for the Denmark national team.
Club career Fulham O'Riley joined the academy of Fulham at the age of eight, having previously played for Teddington-based NPL Youth. He progressed through several age groups, eventually becoming a regular in the club's U18 and reserve sides. He made his first team debut on 8 August 2017 in a 2–0 EFL Cup first round away win over Wycombe Wanderers.
Over the next two seasons O'Riley featured for the club's U21 side in several EFL Trophy group matches while on the fringes of the first team. He made his Championship debut on 1 January 2020 as a 19th-minute substitute in a 2–1 home defeat to Reading. O'Riley left the club in the summer of 2020, having declined a new three-year first team deal amidst rumoured interest from several clubs domestically and abroad.
Milton Keynes Dons On 24 January 2021, O'Riley signed for League One club Milton Keynes Dons, having spent six months training with the side as a free agent since leaving Fulham. He made his debut for the club two days later on 26 January 2021, in a 1–0 home defeat to Charlton Athletic. Just a week after joining the club, O'Riley scored his first professional career goal in a 2–0 away win over AFC Wimbledon on 30 January 2021.
After an impressive start to the 2021–22 season, on 11 December 2021 he was named EFL Young Player of the Month for November 2021, a month in which he scored four goals in as many appearances.
Celtic On 20 January 2022, O'Riley joined Scottish Premiership club Celtic on a four-and-a-half-year deal for a reported £1,500,000 fee after the club met his release clause. He made his debut on 26 January 2022, starting in a 2–1 away win over Hearts. On 9 February 2022, O'Riley scored his first goal for the club in a 3–2 away victory over Aberdeen. On 9 April 2022 he scored a brace in a 7–0 home win over St Johnstone. O'Riley would help Celtic lift the 2021–22 Scottish Premiership that year.
On 6 September 2022, O'Riley made his UEFA Champions League debut in a 3–0 home defeat against Real Madrid. In September 2023, he signed a new four-year contract with the club. On 20 October 2023, O' Riley was named Scottish Premiership Player of the Month for the month of September. In April 2024, he was named in the PFA Scottish Premiership Team of the Year for the 2023–24 campaign. A month later he was voted Player of the Year, Young Player of the Year and Players' Player of the Year for the 2023–24 season at the club's annual awards ceremony, topping off a successful season in which he went on to claim his third successive league title with Celtic.
Brighton & Hove Albion On 26 August 2024, O'Riley joined Premier League club Brighton & Hove Albion for a fee of £25 million, signing a contract until June 2029. He made his debut the next day, starting in a EFL Cup tie against Crawley Town, but after a nasty tackle was injured nine minutes into the game and forced to come off. O'Riley subsequently underwent ankle surgery, with Brighton chairman Tony Bloom confirming that it was hoped he would return to full fitness "at some point in the latter part of the year." On 9 November 2024, O'Riley scored his first goal for Brighton on his Premier League debut in a 2–1 league win over defending champions Manchester City. His first season was a frustrating one, failing to complete 90 minutes once.
Loan to Marseille On 2 September 2025, Ligue 1 side Marseille announced the season-long loan signing of O'Riley. He made his debut against Lorient in a 4–0 victory, coming off the bench. He scored his first goal against Metz.
On 2 February 2026, the loan was terminated, and the player returned to Brighton.
International career O'Riley was an England youth international. Apart from England, he is eligible to represent Denmark due to his maternal family. In February 2022, O'Riley declared his interest in representing Denmark internationally when he stated that: "I played for England youth teams but at the same time, I do feel quite Danish. My mum is Danish and I can speak a decent amount and I can understand a very good amount. In that sense, I don't think it is out of the question at all. If I did get a call up from Denmark, I don't think I'd be saying no".
In March 2022, O'Riley was called up to the Denmark under-21 for the first time. On 14 June 2022, O'Riley scored his first goal against Turkey in a 2023 UEFA European Under-21 Championship qualification which Denmark won 3–2.
On 20 November 2023, O'Riley made his senior debut for Denmark, starting in a UEFA Euro 2024 qualifying match against Northern Ireland. Despite his fantastic form for Celtic, he was controversially left out of the 26-man squad for the finals in Germany. Denmark manager Kasper Hjulmand said: "Matt has been a really good player, he's had a great season. He played well and I understand the question. I have chosen six other midfielders but it was tight. I have chosen six players that we can move around a bit. Mikkel Damsgaard and Andreas Christensen can also cover positions in the midfield. It has gone beyond Matt, but it was a difficult choice. I know he will play a lot of international matches. He couldn't have done anything differently [to earn a place in the squad]. He could hardly do better than what he did this season."
Career statistics Club
+ Appearances and goals by club, season and competitionClubSeasonLeagueNational cupLeague cupEuropeOtherTotalDivisionAppsGoalsAppsGoalsAppsGoalsAppsGoalsAppsGoalsAppsGoalsFulham U212017–18————30302018–19————10102019–20————2020Total————6060Fulham2017–18Championship000020—00202018–19Premier League000010——102019–20Championship100010—0020Total100040——50Milton Keynes Dons2020–21League One233———102432021–22League One2671010—20307Total49101010—305410Celtic2021–22Scottish Premiership16420—20—2042022–23Scottish Premiership383513060—5242023–24Scottish Premiership3718511060—49192024–25Scottish Premiership20—10——30Total932512250140—12427Brighton & Hove Albion2024–25Premier League2121010——2322025–26Premier League610000——612026–27Premier League20001010—40Total293102010—333Marseille (loan)2025–26Ligue 115120—7010251Career total1873916212022010024741
International
+ Appearances and goals by national team and yearNational teamYearAppsGoalsDenmark202310202410202540Total60
Honours Celtic Scottish Premiership: 2021–22, 2022–23, 2023–24 Scottish Cup: 2022–23, 2023–24 Scottish League Cup: 2022–23
Individual EFL Young Player of the Month: November 2021 Scottish Premiership Goal of the Month: April 2022 Scottish Premiership Player of the Month: September 2023 PFA Scottish Premiership Team of the Year: 2023–24 Celtic Player of the Year: 2023–24 Celtic Players' Player of the Year: 2023–24 Celtic Young Player of the Year: 2022–23, 2023–24
References
External links
England profile at The Football Association