QPR's Darnell Furlong has signed for Albion for an undisclosed fee on a four-year contract.
The 23-year-old, who can play either at right-back or in central defence, becomes Albion's third permenant summer signing - and Albion's fourth in total.
Furlong is a graduate of the Loftus Road club academy and has made more than 60 appearances for the London club.
He has also featured on loan at Cambridge United and Swindon Town before establishing himself in the R's side.