Kourtney Mary Kardashian (born April 18, 1979) is an American businesswoman, socialite, model, actress and reality television personality who gained fame as a cast member of "Keeping Up with the Kardashians", "Kourtney and Kim Take New York", and "Kourtney and Khloé Take Miami". She is the oldest Kardashian sibling. She is the sister of Kim Kardashian and Khloé Kardashian. Her mother is Kris Jenner, her father was Robert Kardashian, and her former stepfather was Bruce Jenner (now Caitlyn Jenner).