Everton have signed Dele Alli from Tottenham on a two-and-a-half-year deal for a fee that could reach £40m.
Frank Lampard made the signing of midfielder Alli a priority and believes he can rebuild a career that has stalled in recent years.
The first £10m of his transfer fee will be payable after 20 appearances.
“I’m delighted to have signed for Everton, a huge club with a great fanbase and history,” said Alli, who scored 67 goals in 269 games at Spurs.
“I’m eager to get started and can’t wait for my first game in an Everton shirt.
“I’m looking forward to helping the team and the opportunity to work with the new manager Frank Lampard.”
He his likely to make his Premier League debut against Newcastle in the Premier League on February 8.
Everton were forced to make the deal permanent because their loan quota is full after adding Manchester United’s Donny van de Beek to the recent signing of Anwar El Ghazi from Aston Villa.
He scored 10 goals in 33 Premier League games during his debut campaign before hitting 18 in the 2016-17 season, earning him two PFA Young Player of the Year awards.
The attacking midfielder started the opening six Premier League games of the current campaign during Nuno Espirito Santo’s brief spell in charge, but struggled for game time under Conte.