Has Vin Diesel just joined the cast of the 'Avatar' sequels?

Vin Diesel looks like he might be heading to Pandora.

The Fast & Furious star took to his Instagram page last night, posting a video for fans, with a rather special pal in tow.

That pal happened to be James Cameron, the director of Avatar 2, 3, 4 and 5, which are being made as we speak.

Read more: Avatar 2 plot will feature a hefty time jump

The pair joked that fans would have to be given the Men In Black memory wipe treatment, so top secret is the current filming situation.

It could be that he was just visiting the set, but the way the pair were talking – with Vin explaining how Cameron is someone he’s always wanted to work with – it feels like he might well be on board.

It’s not known who Diesel could be playing, but he doesn’t start filming the next movie in the Fast & Furious series until June.

Read more: James Cameron confirms Avatar sequel titles

Cameron wrapped his work on the performance capture elements of the movie in November last year, and is now embarking on the live action sequences, all paid for with his mind-blowing $250 million budget.

If he is on board, Diesel will be added to a growing cast, with original stars Sam Worthington, Zoe Saldana, Sigourney Weaver and Stephen Lang being joined by Kate Winslet, Oona Chaplin, David Thewlis and Edie Falco.

The first of the four new movies (with their super-weird working titles) will land in December, 2020.