The two shared a romantic kiss, while posing for the photographers at the star-studded affair, reported Time.
Gomez, 24, wore a lace maxi by Coach featuring sequin embellishment, while The Weeknd, 27, suited up in black tuxedo.
Last month, the "Staryboy" hitmaker made his relationship with Gomez Instagram official after he posted a photo of the diva kissing him on his cheek -- on his photo-video sharing app's account.