Work on the next four Avatar films is under way, director James Cameron has said.

The original 2009 3D blockbuster won three Oscars for its stunning visual effects, cinematography and art direction.

In a Facebook post Cameron wrote: “Great to be working with the best team in the business!

“Avatar takes flight as we begin concurrent production on four sequels.

“The journey continues December 18, 2020, December 17, 2021, December 20, 2024 and December 19, 2025!”

He included an image of the Avatar team alongside the post on the film’s official Facebook page.

The first sequel had originally been due out in 2018 but Cameron said last month that it would not be possible to make that deadline.

Stars of the first Avatar – Zoe Saldana, Stephen Lang, Sigourney Weaver and Sam Worthington – will return to their roles, despite Weaver’s character being killed off in the original film.