12/05/2012 at 12:00 PM EST
Fashion expert Louise Roe knows that romance never goes out of style.
The host of NBC's Fashion Star
was vacationing with her boyfriend of 2½ years, Josh Slack, when he proposed to her – with her great-grandmother's aquamarine ring.
"I'm on cloud nine," Roe tells PEOPLE. "We're going to choose an engagement ring together but for now I'm wearing this, which has huge sentimental value to me."
A British television personality and fashion editor-at-large for Glamour
, Roe, who turned 31 on Monday, has replaced Elle MacPherson
on Fashion Star
and hosts Plain Jane
In the UK she has hosted such BBC programs as The Clothes Show
and Addicted to Boob Jobs,
and was a guest judge on Britain's Next Top Model
and Project Catwalk.
– Jennifer Garcia