Sweeney made an appearance at the 16th Governors Awards, held on Sunday, Nov. 16, in Hollywood, alongside A-listers like Jennifer Lawrence, Dakota Johnson, and Jennifer Lopez. Despite the guest list of veteran style icons, the Anyone But You star held her own in a Miu Miu look that utterly dazzled. Literally. Styled by her go-to Molly Dickson, her strapless gown featured a cleavage-baring sweetheart neckline (a Sweeney fave) and a form-fitting bodice, which fanned into a floor-length quasi-mermaid silhouette.