Musician and actor Jay Chou is joining Hollywood star Vin Diesel in the fourth instalment of the "xXx" franchise. D.J. Caruso is directing the movie, reports variety.com."

Chou said of Caruso: "I've met DJ a number of times over the past few months and it's very clear how talented he is as a director. I am looking forward to working with him and Vin in bringing this film to global audiences. This is an incredibly exciting film which I'm beyond happy to join."