 The reality series revolves around the children of Kris Jenner, and originally focused mainly on the children from her first marriage to deceased attorney Robert Kardashian: Kourtney, Kim, Khloé, and Rob. Kris'children Kendall and Kylie from her subsequent marriage to American athlete Caitlyn Jenner (previously known as Bruce) have also been featured on the show since its beginning, along with Jenner's son Brody from another marriage, although he appeared very few times during the early seasons, mostly being called by his step-brother Rob to babysit their half-sisters Kylie and Kendall. Kourtney's boyfriend Scott Disick has also been appearing frequently on the show since the first season, as well as on the show's spin-offs. Cast members also include numerous friends and other acquaintances of the family members, most notably Malika Haqq and Jonathan Cheban who joined Keeping Up with the Kardashians in the second and third seasons, respectively.
