In addition to becoming Instagram-official and giving gushing interviews about each other, a major celebrity relationship milestone is walking the red carpet together.

After nearly two years of being an on-and-off couple, Orlando Bloom and Katy Perry can finally check the red carpet debut off their relationship to-do list.

They appeared together at the Gala for the Global Ocean at the Opera of Monte-Carlo in Monaco on Wednesday. Perry chose an interesting evening gown by Tom Ford that seemingly had mirrors for sleeves, while Bloom looked sharp in a textured black suit.