Jobe Bellingham has joined Borussia Dortmund from Sunderland on a five-year contract until June 2030.
Sunderland say the fee is a club record, believed to be 32m euros (£26.96m) plus 5m euros (£4.2m) in add-ons.
The 19-year-old midfielder has played for the Black Cats since 2023, making 90 appearances, and helped them secure promotion to the Premier League last season.
Bellingham began his career at Birmingham City, coming through the academy before playing two years of senior football for the club.
In a statement, Bellingham said he is proud of the "strong" relationship he has with Sunderland supporters.