Red-Carpet Official!

After almost three years together, Britney Spears, 37, and Sam Asghari, 25, made their official debut at the Once Upon a Time in Hollywood premiere on July 22. (The rumor mill had a field day when eagle-eyed fans spotted what looked like an engagement ring on her finger.) A source tells Us that the couple were “really looking forward to their first premiere together,” and Spears was particularly excited because she’s “a huge Brad Pitt fan.”