Gregg was married for the first time to NeNe Leakes, a former Real Housewives of Atlanta star. Their first marriage was in 1997. She filed for divorce in 2010. They reunited in 2013 and were remarried. His six children, Dexter Dexter Denton, Denton, Katrina, and Brentt, his son with NeNe, are his survivors. He was also NeNe's stepdad, Bryson, who she had from an earlier relationship.
NeNe, 53 years old, revealed that Gregg was diagnosed with stage 3 colon carcinoma in June 2018. However, he is now cancer-free as of May 2019. In June, NeNe announced that Gregg's cancer had returned. She shared with fans a month later that her husband was doing well and said that he had been discharged from the hospital following surgery. He was also admitted for six weeks.