Kate Winslet will star in 'Avatar' film series, reuniting with 'Titanic' director James Cameron after 20 years

Two decades after working with director James Cameron on the box-office smash "Titanic," Kate Winslet is now joining Cameron's series of "Avatar" sequels in a starring role, Deadline reports.

"Kate and I have been looking for something to do together for 20 years, since our collaboration on 'Titanic,' which was one of the most rewarding of my career," Cameron told the outlet. "I can't wait to see her bring the character of Ronal to life."

In the meantime, Winslet stars alongside Idris Elba in "The Mountain Between Us," which opens Friday.

She also stars alongside Justin Timberlake and Juno Temple in Woody Allen's upcoming movie, "Wonder Wheel," which opens November 30.

Production for the four "Avatar" sequels began in late September, with a reported production budget of over $1 billion, making it the most expensive film series in history. The first "Avatar," released in 2009, is the highest-grossing worldwide release of all time with $2.7 billion.

20th Century Fox plans to release the first "Avatar" sequel on December 18, 2020, while the next movie is to be released a year later. The last two are slated for December 2024 and 2025.