The reigning European champions announced the arrival of Harvey Elliott from Fulham after the 16-year-old Englishman’s youth contract expired with Scott Parker’s side. Due to the nature of the deal, Fulham are hoping that Liverpool will be ordered to pay a record tribunal fee of more than £10 million when the matter is concluded. Elliott became the youngest player to play in the Premier League, aged 16 years and 30 days when he made his league debut after coming on as an 88th-minute substitute in a 1–0 away defeat to Wolves on 4 May 2019.

Elliott became right away part of Liverpool's first team on his arrival and featured in the US tour in the 2019/20 pre-season. At 16 years, 5 months and 22 days Elliott became the second-youngest player in the club's history to make his debut, when he featured against Milton Keynes Dons in the Carabao Cup on 25 September 2019. He played two more ties in the competition as well as three games in the FA Cup and made two late substitute appearances in the Premier League. He also excelled at reserve level in both Premier League 2 and the UEFA Youth League. Elliot started the League Cup tie at Lincoln on 24 September 2020, then in order to gain more first team experience, a deal was agreed on 16 October for him to join Blackburn on loan for the remainder of the 2020/21 season. He enjoyed  a successful spell there, scoring seven goals and getting eleven assists in 41 Championship appearances. 

In February 2021 Liverpool were ordered to pay £1.2m initially to Fulham for Elliott by the Professional Football Compensation Committee. Plus £500,000 when he signs two professional contracts. First team appearances could take it to a max of £4.3million and Fulham will get 20% of any sell on fee. 

Elliot came on as a late substitute in Liverpool's 3-0 win at Norwich on the opening day of 2021/22. He started the next two games, both at Anfield, then suffered a dislocated ankle in a victory at Leeds on 12 September. This could have ruled him out for the rest of the season but his recovery went well and by February he was back in contention and had an emotional return to action, coming off the bench to score in an FA Cup victory at home to Cardiff. His appearances for the rest of the season were fleeting, but he did come off the bench in the League Cup final, scoring in the shoot out. This was all the more remarkable as he was not expected to feature until Thiago Alcantara got injured in the warm up. 

During 2022/23 he featured regularly in the Reds midfield, making 32 Premier League appearances. He scored his first league goal at home to Bournemouth in August and got his first Champions League goal in a 7-1 rout of Rangers at Ibrox. The following season was one when Liverpool's squad was rocked by injuries but Elliot remained fit throughout the season. He was included in every matchday squad and by the end of the season had scored four times in 56 appearances. Highlights were an injury time winner at Crystal Palace and a superb solo effort at home to Tottenham Hotspur. He was also a key figure with England Under 21's, scoring seven goals in seven appearances in the European Championship qualifiers. 

Elliot was only used sparingly by Arne Slot in the 2024/25 title winning season, with 16 of his 18 appearances being as a substitute. The 2024/25 season proved frustrating for Harvey Elliott, who struggled to secure regular first-team minutes under Arne Slot. A broken foot sustained on England U21 duty in September sidelined him until November disrupting his momentum. By the time he returned, Liverpool’s midfield had already settled, with Alexis Mac Allister and Dominik Szoboszlai anchoring the creative roles, leaving little room for Elliott, who faced limited chances to rotate into the side. Slot’s preference for players with physical presence and pressing ability meant Elliott’s more creative style rarely matched the demands of the starting XI. His contributions came largely from short substitute appearances, and he made only two league starts throughout the season after the league title had been won. Frustration was inevitable, particularly as he reached a stage of his career where consistent playing time was crucial for development. Elliott’s technical skill and vision were still apparent in brief cameos, offering glimpses of the talent that had marked him out as a future star. By the season’s end, it was clear that without either tactical adjustment or a move elsewhere, Elliott’s path to regular first-team football would remain blocked.

Elliott had a sensational summer in 2025 as he starred for England as they won the European Under 21 Championship, scoring five goals and being named player of the tournament. At the very end of the 2025 summer transfer window, Elliott left Liverpool to join Aston Villa on a loan arrangement that included an obligation for Villa to make the move permanent for around £35 million the following year. As part of the deal, Liverpool ensured they retained some influence over his future by adding both a buy-back option and a percentage of any future sale.