Is this Vin Diesel's mystery Marvel role?

Production is now underway on Marvel's second movie release of 2014, Guardians Of The Galaxy. James Gunn is directing, and the movie was on location in London over the weekend.

And it seems as if one mystery may well have been solved, that's to do with the movie. Just before Comic-Con, Vin Diesel teased on his Facebook page both that he'd been asked for a meeting with Marvel Studios, and subsequently that said meeting had taken place.

So what was the mystery role that Diesel was linked with? Well, multiple sources are now reporting that he's going to be lending his vocal talents to Groot in the movie. Groot is a living tree creature, who doesn't have too much to say, but it looks like he'll be saying it with Diesel's voice. It'd be remiss of us not to give Vin Diesel's excellent voice work in Brad Bird's classic The Iron Giant a nod at this point.

Guardians Of The Galaxy is set for release on 1st August 2014. More details as we get them...