Isobel Stevens on “Grey’s Anatomy.” Katherine Heigl and her mother. 22 sept. 2023 · Katherine Heigl: Net Worth: $30 million: Last Updated: October, 2023: Birth Place: Washington, D.C, United States: Horoscope (Sunshine): Sagittarius: Salary: N/A: Height / How tall : 5 feet 9 inches (1.75m) Ethnicity (Race): German, Irish descent: Nationality: American: Profession: Actress, model: Father's Name: Paul Heigl: Mother's Name: Nancy.