The former Anderlecht forward has joined the Everton squad training at Finch Farm and spent last season on loan with Monaco’s B team. Roberto Martinez has said that Henen will join the Under 21 squad.
Henen had attracted interest from Arsenal and Manchester United but has chosen to join Everton.
The teenager is highly rated on the continent and has even been likened to both Cristiano Ronaldo and Neymar.
He is versatile and is as comfortable out wide as he is through the middle, and is expected to progress well during his time at Everton.