Who is Nicole Richie's biological father?

Nicole Richie's biological father is Lionel Richie, the famous American singer, songwriter, and music producer. Although she was adopted by Lionel and his then-wife, Brenda Harvey, her biological parents are Lionel Richie and his high school girlfriend, who was a teenager at the time. Nicole was primarily raised by Lionel and Brenda, which contributed to her public persona and career.