Milambo had a remarkable season in the Netherlands, scoring seven goals and providing seven assists in 42 games, which has caught the attention of many clubs, including Brentford.
According to reports, Brentford's offer was accepted by Feyenoord, despite the Dutch club's initial desire to keep Milambo at the club.
Milambo, who made his professional debut at a young age, will leave his boyhood club with 60 games under his belt and a record as the club's youngest ever professional debut maker.