Dressed in a floral floor-length gown with striking puffy sleeves, the actress turned heads at the glitzy event with her choice of outfit.
A floaty, feminine look, her dress was finished with intricate lace edging and a sweetheart neckline.
The 27-year-old styled her unique dress from Brock Collection with bold yellow eyeshadow and slicked, wet-look hair. Her makeup artist, Pati Dubroff, shared a closeup of the bright eye look, calling the vibe “Mellow Yellow.”
Of course, social media erupted over the fashion turn.
One user said: “I honestly don’t like this dress on Margot,” while another remarked: “I don’t like anything about this style, make up/hair/clothing all wrong!”
But while some hated the look, others raved about it, with one saying: “I can’t breathe! She is so amazing! She looks so damn cute.”
The movie is based on the life of “Winnie the Pooh” author A.A. Milne. Robbie plays his wife, Daphne.
Read more from Yahoo Lifestyle:
- Is nothing sacred? Celebrities keep sharing potty pix
- Lara Trump wears heels and an LBD one week after son’s birth
- Jessica Simpson owns her apparent drunkenness — as only she can