Brighton have signed Imari Samuels from Reading on a contract until June 2024.
The 19-year-old left-back arrives having made 16 appearances for the Royals in Premier League 2 last season, and has represented England at youth level up to under-17s.
He will join up with the under-21s squad, and will be available for their first game of this year's PL2 campaign against Crystal Palace on Monday night.
Coach Andrew Crofts told the club's website, “We are delighted to welcome Imari to the club and are really excited to start working with him.
“He's an exciting talent, who can play on either side, who likes to attack."