Watford have signed Belgian striker Obbi Oulare for an undisclosed fee from Club Brugge.
Oulare, who has scored nine goals in 39 appearances for Brugge, has signed a five-year contract at Vicarage Road.
The 19-year-old was a substitute for the recent Champions League play-off tie against Manchester United.
Meanwhile, the Hornets have loaned defender Miguel Layun to join Porto for the rest of the season, with a view to a permanent £4.4m transfer next summer.