Charli XCX and Olivia Wilde will co-star in 'I Want Your Sex'.

The 'brat' singer and the 'Don't Worry Darling' director have been cast in the upcoming movie from filmmaker Gregg Araki, according to the Hollywood Reporter.

'Licorice Pizza's Cooper Hoffman will also star in the film, which was co-written by Araki and Karley Sciortino.

THR reports that the synopsis for the film reads: "When fresh-faced Elliot (Hoffman) lands an exciting job for renowned artist, icon and provocateur Erika Tracy (Wilde), his fantasies come true as Erika taps him to become her sexual muse. But Elliot soon finds himself out of his depth as Erika takes him on a journey more profound than he ever could have imagined, into a world of sex, obsession, power, betrayal and murder."

Seth Caplan, Araki and Sciortino will produce, along with Black Bear’s Teddy Schwarzman and Michael Heimler.

John Friedberg, Joanne Roberts Wiles and Courtney L. Cunniff will executive produce.

This will be Charli xcx's second live-action film role.

The 32-year-old singer will make her debut in Legendary’s 'Faces of Death', a remake of the late ’70s classic horror, alongside Barbie Ferreira, Dacre Montgomery, Josie Totah and Jermaine Fowler.