Real Housewives of Atlanta star Peter Thomas shared exciting news on Tuesday, when he proudly announced that he is going to be a grandfather for the first time!

The estranged husband of Cynthia Bailey posted a photo of his 32-year-old daughter Porshe and her husband Till H. Groß.

Alongside the photo, Thomas shared a happy message that read, “My daughter got married 5 months ago, she just told me that she is PREGNANT, so I am going to be a GRANDFATHER for the first time, TWINS.”

Want all the latest pregnancy and birth announcements, plus celebrity mom blogs? Click here to get those and more in the PEOPLE Babies newsletter.

In March, the father of five gave walked his eldest child down the aisle at her nuptials at Greystone Mansion in Beverly Hills.

The baby news comes amid Thomas’ separation from his wife of six years.

“Peter and I are separated. He lives in Charlotte, and I live in Atlanta,” Bailey, 48, told The Daily Dish in an interview published in May.

The pair’s ups and downs, including infidelity rumors, were well-documented on the Bravo reality series since they joined in season 3. Thomas and Bailey wed in 2011, broadcasting their wedding during the season 3 finale of RHOA.

Karen Mizoguchi