Millie Bobby Brown & the 'Stranger Things' Cast Celebrate Season 3!

Millie Bobby Brown looked stunning at the premiere of Stranger Things!

The 15-year-old actress joined the rest of the cast at the event on Friday night (June 28) in Santa Monica, Calif.

PHOTOS: Check out the latest pics of Millie Bobby Brown

They were also joined by their co-stars Gaten Matarazzo, Caleb McLaughlin, Sadie Sink, Finn Wolfhard, Noah Schnapp, Joe Keery and Natalia Dyer.

Other attendees included new cast members Dacre Montgomery, Priah Ferguson, Maya Hawke, and Francesca Reale.

Make sure check out the latest trailer for season three!

Stranger Things will be available for streaming on Netflix starting on July 4th!

FYI: Millie is wearing Rodarte. Finn is wearing Saint Laurent by Anthony Vaccarello. Sadie is wearing Prada with Sophia Webster heels. Francesca is wearing Kimberly Parker Atelier, Schutz heels, and Vita Fede and Octavia Elizabeth jewelry. Noah is wearing Fendi. Gaten is wearing an Asos blazer.