The couple was all smiles as they cuddled, smooched and sat side-by-side at the ceremony, which saw Taylor take home top honors, including Top Female Artist and Top Billboard Achievement.
Social media went crazy when Calvin was captured kissing the “Bad Blood” singer on the cheek and giving her a tight embrace after she won the Top Artist award.
The new romance seems to agree with the 25-year-old pop star, who looked stunning in a white, beaded and backless Balmain jumpsuit, while her new her beau opted for all black.
Romance rumors sparked when Swift was spotted with the famous DJ in Nashville back in March. The two were recently spied holding hands on a dinner date this week in Los Angeles.
Check out more moments from the Billboard Music Awards here.