Heather was born in the Bronx and grew up in Chappaqua, New York. She is a fifth-generation American of Austrian, Hungarian, and Polish ancestry. In 1990, she received a BFA from Syracuse University. From 2000 to 2002, she starred in the CBS television drama That's Life as Lydia DeLucca. She also composed the show's theme song, "Learnin' As I Go", used in the second season. Heather joined The Real Housewives of Orange County in Season 7. She officially changed her name from Heather Paige Kent to Heather Dubrow and has since been credited with the latter name in her television roles.
In 1999, Heather married Terry DuBrow, a plastic surgeon. Terry is the younger brother of the late heavy metal singer Kevin DuBrow, who performed in the band Quiet Riot. They reside in Orange County, California and have four children: twins Nicholas and Maximillia, and daughters Katarina and Collette. In 2013, Heather and Terry sold their mansion for a reported 16.4 million dollars, and bought land in a new community where they will build a new home more suitable for their growing family. Heather has recently returned to her acting roots, landing guest roles on hit television shows including Malibu Country,Hot in Cleveland, and Hawaii Five-0.