The Real Housewives of New York regular's representative reveals businessman Thomas D'Agostino popped the question to the 50-year-old in the Big Apple over the weekend (06-07Feb16), a week earlier than planned.

"Thomas wanted to do the honour on Valentine's Day (14Feb16), but just couldn't wait and gave Luann an eight carat canary yellow diamond ring," the spokesperson tells U.S. news show Entertainment Tonight.

"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 rep adds, "The happy couple (is) celebrating (by) jetting off for a ski vacation in Vail, Colorado this week."

Luann, who was introduced to Thomas by her Real Housewives co-star Dorinda Medley last year (15), has since confirmed the news by sharing a photo of the happy couple on Instagram.

"Yes, it's true!" she wrote alongside the image, adding the hashtags "#love" and "#engaged".

De Lesseps was previously married to entrepreneur Alexandre de Lesseps, the father of her two children, from 1993 to 2009.