SCROLL DOWN FOR VIDEO
"Here comes the big news guys. It involves me and @esteelauder," Kendall posted. "I'm super excited to announce that I am the new face of @esteelauder!"
The American cosmetics company, which originated in New York, released a video on their website showing Kendall explaining how her interest in make-up began when she was just a youngster.
"The first time I wore make-up I was a little girl and my mum was filming me," says Kendall as footage of her as a child plays with Kris Jenner asking her daughter "did you put your make-up on all by yourself?"
Kim Kardashian's younger sister goes on to say: "To think back to me as a young kid going through my mum's make-up drawer playing with Estée Lauder to now, I'm a part of this family. It's something that I didn't really expect to happen so quickly. It's so crazy."
The 19-year-old model and reality TV star had been hinting to her fans that she had exciting career news to reveal.
On Friday Kendall posted a photo on Instagram of herself smiling down exciting at her phone which the caption: "Big news tomorrow...#WatchThisSpace."