Claim: Kris Jenner has four children with Robert Kardashian, including the stars of Keeping Up with the Kardashians.

Kourtney Mary Kardashian -LRB- born April 18 , 1979 -RRB- is an American television personality , socialite , businesswoman and model . In 2007 , she and her family were picked to star in the reality television series Keeping Up with the Kardashians . Its success led to the creation of spin-offs including Kourtney and Khloé Take Miami and Kourtney and Kim Take New York .   With sisters Kim and Khloé , Kourtney is involved in the retail and fashion industries . They have launched several clothing collections and fragrances , and additionally released the book Kardashian Konfidential in 2010 .