Albion centre-half Lewis Dunk has signed a new four-year contract.
The 22-year-old is the latest young prospect to pledge his long-term future to the club after Solly March, Jake Forster-Caskey, Rohan Ince and Christian Walton all recently agreed new deals.
Manager Sami Hyypia said, "Lewis fully deserves this new contract. He has proved that he is worthy of a place in our first-team squad, and he has a very bright future ahead of him.
"He has come through the club’s youth system and developed as a player. It is now up to Lewis to work hard, continue learning and try to earn a regular place in the first team."
Dunk, currently troubled by an ankle injury, has made 68 senior appearances.