Brighton & Hove Albion have signed Poland midfielder Kacper Kozlowski from Ekstraklasa side Pogon Szczecin on a four-and-a-half-year deal.
The highly-rated 18-year-old has moved to the Amex for an undisclosed fee on a contract until June 2026.
He will go straight on loan to Belgian Pro League leaders Royale Union St-Gilloise to continue his development.
Brighton technical director Dan Ashworth believes Kozlowski is a "bright young talent".
"The initial plan for him in the short-term will be for him to spend the rest of the season out on loan with Union," Ashworth said.
"[Pathway Development Manager] David Weir and his team will monitor his progress there.