Rose Byrne dressed like a winner in waiting at the 2026 Oscars.
Adam Jason Finmann/Getty Images
Byrne, who was nominated for best actress for her role in If I Had Legs I’d Kick You, embraced Old Hollywood glamour over the course of the 2026 awards season (see: the green Chanel Atonement-esque dress she wore to the Golden Globes). The Academy Awards were no exception: she went out with a bang in custom Dior by Jonathan Anderson, based on Look 35 from his couture debut.
Byrne wore a black crepe strapless dress with blooming three-dimensional flowers embroidered along the bodice and hem. But instead of the asymmetrical, drapey dress that walked the spring 2026 couture runway, Byrne opted for a classic mermaid silhouette. Stylist Kate Young finished off the look with Taffin jewelry, including a sculptural necklace with an inverted 16.54 Ashoka-cut diamond cognac diamond pendant. On the beauty front, the actor kept it classic in a sleek low bun and a striking red lip.
LOS ANGELES, CALIFORNIA – MARCH 15: (SLOW-MO) Rose Byrne attends the 2026 Vanity Fair Oscar Party Hosted By Mark Guiducci at Los Angeles County Museum of Art on March 15, 2026 in Los Angeles, California. (Footage by Adam Jason Finmann/Getty Images)Adam Jason Finmann/Getty Images
After hitting the stage with her Bridesmaids co-stars—Maya Rudolph, Kristen Wiig, Melissa McCarthy, and Ellie Kemper—she hit the Vanity Fair Oscars Party. There, she traded her mermaid gown for a two-piece look from Dior: a strapless crop top and maxi skirt embellished with tiers of beaded fringe.
Between her ultra-glam ceremony dress and her celebratory after-party two-piece, Rose Byrne met the moment at the 2026 Oscars.
See Every Look From the 2026 Oscars Red Carpet:
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