Dean had a breakout role opposite Woody Harrelson in Triangle of Sadness, which won the top prize, the Palme d’Or, at this year’s Cannes Film Festival.
In Black Lightning, based on DC Comics characters, she appeared as Syonide.
Dean’s representatives said her death in hospital from a sudden unexpected illness was “devastating”.
In writer and director Ruben Ostlund’s Triangle of Sadness, Dean played Yaya, one half of a model couple who were invited on a cruise that goes horribly wrong.
The film is a biting social satire that sees models and the ultra-rich have their status undermined by unexpected events. It is set to be released in October and also expected to be in the 2023 Oscar running.
Speaking about the film before it was crowned at Cannes in May, she told the Associated Press: “For me, I’m like, I’ve already won. I’m already at Cannes with the movie. That’s so unbelievable. Anything is just a cherry on top at this point for me.”
Born and raised in Cape Town, Dean became a childhood model, adorning the covers of the South African editions of GQ and Elle, before making her acting debut in the 2010 film Spud – an adaptation of a popular South African novel that also starred Troye Sivan and John Cleese.
She went on to appear in such films as Death Race 3: Inferno and Blood in the Water, as well as Don’t Sleep and Porthole.
Dean, who survived a near-fatal car accident in 2008, was engaged to model Luke Volker, who posted from Cannes that he “couldn’t be more proud” of her.
