Mariah, 49, waved at fans before heading inside.
She accessorized her little black dress look with a ton of bling.
Bryan, 36, appeared dapper in his form-fitting suit.
The star-studded gathering included an appearance by supermodel Bella Hadid. She wowed the crowds in a fierce red number at the premiere of Pain And Glory (Dolor Y Gloria/ Douleur Et Glorie).
Other celebs present overseas included Penelope Cruz, Quentin Tarantino and Selena Gomez.