Sorry, ladies who were in middle school in the late '90s: The Backstreet Boys' Nick Carter appears to be off the market.

Carter, 33, hinted at a very major life event in a recent Instagram photo with the caption, "Big question...great answer."

Carter popped the question to his longtime girlfriend Lauren Kitt on a secluded Florida Keys island with a 7-carat ring diamond ring. Kitt is a fitness expert who was maybe in talks to become a WWE Diva late last year. She tweets things like, "Working on building my abs and lower body. Later Brazilian Jiu Jitsu training...long day!"

"I wasn't expecting it. It just felt very surreal," Kitt told People of the engagement. "We both are just so happy in love right now and on cloud nine."

Nick Carter, the youngest member of the Backstreet Boys, was romantically linked to Willa "I Wanna Be Bad" Ford and Paris Hilton.