Check out some of their daring and downright fabulous style moments below.
Paris, 25th of July
Cara opted for a mermaid-inspired crystal-embellished long sleeve dress with a plunging neckline and high leg slit.
Meanwhile, Rihanna was really doing the damn most in a feathered, beaded blush pink bra and top combo from Prada's Fall 2017 line. She accessorised with Charlotte Olympia heels and retro pink sunglasses... at nighttime... because fashion.
These are lewks worth another viewing, my friends.
London, 24th of July
The UK premiere saw Cara wow in a custom Burberry suit with a diamond spiderweb. She also brought a little nostalgia to the ensemble, with a thin black headband perched on her platinum blonde pixie cut.
Meanwhile, Rihanna channelled the Flamenco Girl emoji in a red Giambattista Valli gown and subtle makeup from her Fenty Beauty line.
Earlier in the day Cara dressed head to toe in Alexander Wang, pairing a tweed suit with black leather boots at a photo-call for the film.
Hollywood, 17th of July
Cara donned a futuristic metallic dress by Iris Van Herpen, which she accessorised with a silver toupe.
Rihanna made a fashionable entrance to the first premiere, in a volumous off-the-shoulder Giambattista Valli gown with an extravagant train. She paired the gown with lace up pink heels.
KEEP DOING THE MOST LADIES.