Nicole was born to her biological parents, Peter Michael Escovedo and Karen Moss, on 21 Sep., 1981. According to Entertainment Tonight, Escovedo was a musician who used to be part of Lionel's band. Moss, meanwhile, worked as an assistant to Escovedo's sister, performer and famed singer Sheila E., and also toured with the late Prince, according to Biography.
In the past, Nicole has talked about her relationship with her biological parents and how she coped with being adopted. In 2007, the mum of two told Access Hollywood (via CBS News) that her first pregnancy encouraged her to mend their bond. "When I found out that I was pregnant, there was just something inside of me that felt a responsibility to mend any issues that I've had with my parents in the past," she said, adding that it "wasn't an overnight decision." "Because listen, I have put them through a lot."
It seems that since then, Nicole — who's been married to rock singer Joel Madden since 2010 — hasn't spoken about the two publicly so it's unclear if she stays in touch with them. In Sheila E.'s 2014 memoir "The Beat of My Own Drum," she touched on Nicole's adoption and wrote, as per the New York Daily News, "The heartbreaking part is that once Nicole Escovedo legally became Nicole Richie, it felt like we lost her. We all lost her."