Being part of the Kardashian family can’t be easy if you are unsure of what you want to do when you grow up, but fortunately for Kendall Jenner, she knew from a young age.

While she’s worked really hard to get to be the face of numerous companies, magazines, and runways, she’s also done all of it before the age of 20 years old. She recently spoke with the Wall Street Journal in a “youth” topic discussion, where she revealed that she thinks she grew up too fast.

She tells the magazine:

“I feel like I grew up too fast a long time ago. Having older siblings, you grow up around adults, so you mature more quickly. I saw my sisters and parents working every day, so I was pretty much brought up to be a workaholic. But I just turned 19 a couple weeks ago, and I’m scared to be 20—it’s the first step out of being a teenager.

My sister Khloé always says to me and my younger sister, Kylie: You have your whole life to be an adult but only so long to be a kid. And we get it. In the right situations, I try to be as immature as I can sometimes—react to things as if I were 12. You can’t take things too seriously. I just laugh thinking about my dad being a teenager, partying. It’s the funniest thing. And it makes me think—what am I going to be like when I’m 65?”

Kendall’s success is skyrocketing more and more, but will it all come with a cost if she doesn’t embrace her younger years?