Sadie Sink flashed her bra in a sleek black outfit on Thursday as she attended the Chanel Cruise in Marseille.

The Stranger Things actress, 32, wore a leather-look black short-sleeved top, which she unbuttoned from the bottom, leaving just the top button done.

She paired it with a skirt of matching material which reached below her knees and a pair of chunky black boots.

The American star was joined in the front row by Marion Cotillard and Game Of Thrones actress Nathalie Emmanuel.

Also at the star-studded show was Lily-Rose Depp who flaunted her washboard abs in a black crop top.

Sadie Sink, 22, flashed her bra in a sleek black outfit on Thursday as she attended the Chanel Cruise in Marseille

She paired a mostly unbuttoned shirt with a skirt of matching material which reached below her knees and a pair of chunky black boots

The American star was joined in the front row by Marion Cotillard and Game Of Thrones actress Nathalie Emmanuel

The fifth and final series of Stranger Things will air sometime in 2025.

Sadie has been a member of the cast since its second series and plays Max Mayfield, the stepsister of Billy Hargrove (Dacre Montgomery).

The Netflix sci-fi series shot Millie Bobby Brown, who plays its main character Eleven/Jane Hopper, into superstardom.

In February, the salary bumps of the cast of Stranger Things cast were revealed, with Millie, 20, the future daughter-in-law of Jon Bon Jovi, topping the list, according to Puck News. 

Stranger Things captured the hearts of viewers when it debuted in 2016, introducing a host of child actors.

Finn Wolfhard (Mike Wheeler), Caleb McLaughlin (Lucas Sinclair), Gaten Matarrazo (Dustin Henderson), and Noah Schnapp (Will Buyers) joined Millie as the show's focus group of friends when it first aired. 

Completing the show's main cast set to return for season five are the older siblings and their peers - Natalia Dyer (Nancy Wheeler), Charlie Heaton (Jonathan Byers), Joe Keery (Steve Harrington) and Maya Hawke (Robin Buckley).

Netflix confirmed in January that the hit was finally back in production after being delayed by the Hollywood strikes.

L-R Noah Schnapp (Will Buyers), Finn Wolfhard (Mike Wheeler), Gaten Matarrazo (Dustin Henderson), and Caleb McLaughlin (Lucas Sinclair) join Millie as the show's focus group

Completing the show's main cast are Joe Keery (Steve Harrington) and Maya Hawke (Robin Buckley) - both pictured

The streaming platform took to social media in February to share a photograph of the cast and creators Matt and Ross Duffer back together again.

But eagle-eyed fans were quick to notice that Sadie was in the photo.

It confirmed her return to the cast after her character's fate was left up in the air in a cliff hanger at the end of series four.

The series ended with Max in a coma after nearly being killed by the villainous Vecna. 

Stranger Things fans have spotted a spoiler after Netflix dropped a production picture from the hotly-anticipated series five cast meeting on Monday