Chelsea defender Jake Clarke-Salter will spend the season on loan at Birmingham after signing a new contract with the Premier League club.
The England Under-21s captain has agreed a new deal at Stamford Bridge that runs until 2022, the Blues announced.
A club statement read: “Jake Clarke-Salter has signed a new contract and joined Birmingham on loan for the 2019-20 season.
“The 21-year old’s Chelsea contract extension commits him to the club until at least 2022.”
Birmingham claimed they “beat off significant competition” from a handful of Championship clubs for Clarke-Salter.
Pep Clotet’s side have been in the market for a centre-back after former captain Michael Morrison left St Andrews following the end of his contract.
Clarke-Salter, who came through the youth ranks at Chelsea, has spent the previous three seasons out on loan with spells at Bristol Rovers and Sunderland followed by a year in Holland with Vitesse Arnhem.
Meanwhile, Birmingham striker Lukas Jutkiewicz has signed a two-year contract extension which ties him to the club until at least 2022.
The 30-year-old, who moved to St Andrew’s from Burnley in the summer of 2016, scored 14 goals last season and added an impressive 10 assists.