Kendall Jenner has opened up about a time in her life when she was “mean” to sister Kylie Jenner because she was so unhappy in herself.

While the Keeping Up With The Kardashians star are now BFFs, co-authors of YA novel, and founders of the Kendall + Kylie Clothing Collection, their relationship clearly went through a bit of a rough patch growing up.

During an interview on Beats 1 Zaza World Radio, the model confessed that there was a reason behind her moody streak: “I was so mean to them [Kylie and friends] sometimes… just because they had all these friends, they were living it good and I was so lonely and in my bed by myself.”

Having turned to music during this dark period, pal Jordyn Woods revealed that she refused to even share the names of her favourite songs: “One story about Kendall’s music taste is that Kylie and I would always drive in her car and ask her what songs are playing and she would never give us the music.”

It seems like Kendall’s attitude finally shifted when she found her feet as a successful model: “You guys were there for everything. I was going to say, we are so blessed because not everyone gets to experience it like that.

She added that the memories they have shared together will always be special to her: “We all got to do this together and it’s so beautiful and we really can’t take it for granted. Because it’s very rare and we are all so lucky.”

It sounds like they've all managed to put the past behind them.