"Thomas wanted to do the honor on Valentine's Day, but just couldn't wait and gave Luann an 8 carat canary yellow diamond ring," Lesseps' rep revealed to ET. "Luann is 'over the moon' in love with Thomas, considers him her soulmate and is so happy and grateful to have found love a second time."
"The happy couple [is] celebrating [by] jetting off for a ski vacation in Vail, Co. this week," the rep adds.
The pair were introduced to each other a few months ago by Lessep’s RHONY co-star, Dorinda Medley, and have “been inseparable ever since.”
Lesseps shared a photo on Instagram of the couple looking elated, while giving us a little peek at her new giant bling.
"Yes, it's true! ??#love #engaged," she captioned the pic.