Oops!

Looks like Chloe Grace Moretz's pretty velvet blouse couldn't withstand a busy night of press on Monday, literally coming apart at the seams. The 19-year-old Neighbors 2: Sorority Rising actress wore the delicate purple top during her appearance on Bravo's Watch What Happens Live!, which actually ripped in the back as she was signing autographs for fans.

PICS: Hollywood's Worst Wardrobe Malfunctions

Still, Moretz looked flawless in the hard-to-pull-off blouse from the front, pairing the turtleneck with chic black trousers and strappy stilettos.

Moretz's Watch What Happens Live! appearance was definitely notable, as she finally confirmed her relationship with Victoria and David Beckham's 17-year-old son, Brooklyn Beckham.

"I think the more I don't make it mysterious, the more people don't care, so yes, we're in a relationship," she shared.

"He's a great dad, she's a great mother," she added about her beau's famous parents. "They genuinely are very good parents [and] that's what matters most. ... They made a pretty son."

WATCH: Ariel Winter Shades Chloe Grace Moretz for Her Latest Slam on Kim Kardashian

Moretz is currently busy promoting Neighbors 2 -- out May 20th -- which brings back Seth Rogen and Zac Efron for the highly anticipated sequel. Last month, Efron made his fans happy when he rocked a sexy red dress for a hilarious teaser.

"Sorry mom," he joked.

Watch below!