Liverpool have completed a £35m deal to sign midfielder Alexis Mac Allister from Brighton on a five-year contract.
The fee could rise to £55m for the Argentina playmaker, who helped Brighton finish sixth in the Premier League this season to qualify for Europe for the first time.
The 24-year-old scored 20 goals in 112 appearances for the Seagulls and helped Argentina win the 2022 World Cup.
“It’s a dream come true and I can’t wait,” said Mac Allister.
“I wanted to be in [from] the first day of pre-season, so it’s good that everything is done. I’m looking forward to meeting my team-mates.
“It was a fantastic year for me – World Cup, what we achieved with Brighton – but now it’s time to think about Liverpool and try to be a better player and a better human being every day.”
Liverpool manager Jurgen Klopp is looking to reinforce his midfield with James Milner, Naby Keita and Alex Oxlade-Chamberlain all leaving Anfield this summer.
They were priced out of a move for Borussia Dortmund’s England teenager Jude Bellingham, who looks set to join Real Madrid after the clubs agreed a 103m euro (£88.5m) fee.
Mac Allister joined Brighton from Argentinos Juniors in January 2019 and immediately went back to the Buenos Aires club on loan.