The upcoming wedding marks the second for Lesseps, who was formerly married to Count Alexandre DeLesseps for 16 years. As she previously told the hosts of the FABLife, she found love again with the businessman.
"I'm so lucky. His name is Tom. He's wonderful," she said on the show in February. "He's really just my soul mate. I was married for 16 years the first time, and very lucky and had my two beautiful children and I never thought it would happen to me again, but I found love again, and I'm a hopeless romantic. So, it looks like we're gonna get married."
The timing of the comment could not have been more coincidental for the reality star. Just a few days after the interview, D'Agostino popped the question with an 8-carat canary diamond.
"It happened this past weekend in New York at his house," a source told E! in February. "They're leaving for Vail today for a week's vacation to celebrate. They're both over the moon."
While Tom may be a subject of controversy between LuAnn and her current co-stars, she maintains that he's the one for her.
"I adore Tom and I want to be happy," she told E! News.