Los Angeles, Jan 18 (AZINS) Model Kendall Jenner says having older siblings make you mature quickly and admits she grew up too fast.

The "Keeping Up with the Kardashians" star has penned a column for Wall Street Journal magazine's February issue. The 19-year-old model, who was named as one of 25 most influential teens in 2014, shared her opinion about the topic of youth, reports aceshowbizz.com. 

"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," the model shared. 

"My sister Khloe 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," the Estee Lauder spokesmodel added. 

Kendall found it funny to think about her father Bruce Jenner as a teen.

"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?'," she said.