The oldest of the Kardashian sisters is Kourtney born April 18,. She is one year older than her younger sister making her a firstborn or a. News of actress Kourtney Kardashian's death spread quickly earlier this week, causing concern among fans across the world. However, the July report has. The Kourtney, Kim and Khloé Kardashian hit New York's SoHo neighborhood to scout locations for their new.