Tahith Chong has returned to Birmingham on a permanent deal.
Chong spent last season on loan at Birmingham from Manchester United, making 20 appearances in an injury-hit campaign.
The 22-year-old attacking midfielder has now signed a four-year deal at the Sky Bet Championship club.
Chong told BluesTV: “I am excited to be back. Especially after last season, I have always felt Birmingham City had been my second home.
“It’s nice because I came in, I know everyone already. Seeing familiar faces.
“Everyone at the club, the staff, the players and the fans – everyone made me feel so welcome, a family club.
“I feel ready to go. I am very excited to get going. It’s great to be back.”
Chong moved from his native Netherlands in the summer of 2016 to join United.
He made 16 first-team appearances for United and had loan spells at Werder Bremen and Club Brugge.