Stepping out to the Neighbors 2: Sorority Rising premiere – starring Moretz, 19 – the pair looked adorable together as they posed for photos on the red carpet.
Moretz opted for a lacy LBD and silver stilettos, which perfectly complemented Beckham's black denim jeans and blazer paired with a white button down and tie.
Dating speculation about the two started in 2014 when they were seen hanging out together and attending the Teen Choice Awards as dates, but it wasn't until this month that Moretz confirmed that she and the 17-year-old son of Victoria and David Beckham are official during an appearance on Watch What Happens Live!.
"I think the more I don't make it mysterious the more people don't care, so yes we're in a relationship," she told host Andy Cohen in a game of Plead the Fifth.
Prior to Moretz' confirmation, the relationship rumor mill was buzzing after Beckham shared back to back photos that hinted at the nature of their relationship, but offered no explanation outside of heart emojis and brief captions.
"Matching missing this one," he captioned one photo of the couple's feet in matching shoes.