Luann's name appears as Luann de Lesseps on Twitter following the news of her divorce.
Luann starting adopting the last name D'Agostino on social media in January, shortly after she and Tom tied the knot on December 31, 2016.
Of course, de Lesseps is the name Luann had when we were first introduced to her when RHONY premiered in 2008 and she was married to her first husband, Count Alexandre de Lesseps. The couple decided to end their marriage in 2009.
Luann used social media to announce the news of her divorce from Tom. "It's with great sadness that Tom & I agreed to divorce," she tweeted Thursday. "We care for each other very much, hope you respect our privacy during this sad time!"
Look back on Luann and Tom's relationship in the video above, and then check out some pics from their wedding, below.