Brighton and Hove Albion have signed Billy Gilmour from Chelsea for a fee reported to be in the region of £7million, rising to £10m with add-ons.
Scotland international Gilmour was seen as one of Chelsea's brightest prospects when he broke through in the 2019-20 season under Frank Lampard.
Yet Gilmour struggled to build on that impressive early form and was loaned out to Norwich City last term. He made 24 Premier League appearances as the Canaries were relegated to the Championship.
The 21-year-old midfielder was considered surplus to requirements by Thomas Tuchel on his return to Stamford Bridge, and has now made a permanent switch to Brighton.
He has signed a four-year deal with the Seagulls, with head coach Graham Potter thrilled with the signing.
"Billy arrives with a fantastic pedigree, having played in the Premier League and Champions League as well as for Scotland at last year's Euros. He will complement our existing midfield options," said Potter.
"That experience at quite a young age shows the strength of character he has and we're really excited by his potential.
"Now it's about allowing him the time to get used to a new environment and settling in to our club. We can't wait to work with him."