Bella, 22, shined in an off-white ruffled gown and wore silver diamond cuffs.
The model also attended the exclusive Dior Dinner party the night before in France.
Shailene Woodley mixed business and pleasure with her unique look. The Big Little Lies star, 27, wore a black dress with a tuxedo-esque top.
Rocketman is set to premiere in U.S. theaters on May 31. The musical biopic tells the story of Elton John's rise to fame and the troubles that followed.
Which outfit was your favorite? Sound off in the comments below!