After she topped the best dressed lists in a feather and sequin Givenchy design on the Globes red carpet, the 54-year-old actress wowed again - this time in an all-white jumpsuit by Alexander McQueen complete with jewellery from Fred Leighton.
When it comes to effortless elegance, Julianne always nails it. She shone as she posed next to Kristen Stewart and Kate Bosworth at the Cinema Society event.
Her co-stars got their screening style just right, too. Kristen embraced her signature gothic look in a sheer lace dress by Roksanda Ilincic paired with smoky eye make up while Kate showed off her new short haircut in a mint Oscar de la Renta gown.
With Best Actress nominations at both the Screen Actors Guild Awards and the BAFTAs, we'll be seeing plenty more of Julianne's impeccable red carpet style in the coming weeks.
After she shared her biggest regret from Golden Globes, it sounds like she'll be perfecting her acceptance speech too.
"I didn't stand up straight," the actress told the Huffington Post in an interview on Tuesday. "As I walked up to the stage, I was all hunched over.
"Now I wish I had taken a deep breath and managed to get Kristen [Stewart]'s name out, for one thing, and Alec [Baldwin]'s. Slowing down, I think, is the message," Julianne added.
See more of the Best Actress winner below: