No details of the deal for the 23-year-old have been confirmed but he joins new signings Adil Rami, Florian Thauvin, Valere Germain, Luiz Gustavo, Steve Mandanda and Clinton N’Jie at Stade Velodrome.
Marseille 6/5 to beat Nantes
Amavi had been poised to sign for Sevilla last month, but they pulled out of the transfer after the defender’s medical at the club.
France Under-21 international Amavi was expected to complete a move to the Liga side worth £8million before the deal fell apart, much to the ire of Villa owner Tony Xia.
“JA’s medical report was good,” Xia wrote on Twitter. “Someone hi-level [at Sevilla] didn’t agree with the transfer&found a reason of injury history which is really unfair to JA.
Garcia not expecting to get Giroud
“Very low. I have to say, from a businessman’s viewpoint. Credibility and integrity is something very basic.”