Kim Kardashian's model sister Kendall Jenner has dismissed rumours she is dating superstar Justin Bieber.

The U.S. reality star has been photographed several times over the past year with the Baby hitmaker, leading to romance rumours suggesting he has moved on from his on/off girlfriend Selena Gomez and into the arms of Jenner, but she insists the two are just friends.

She tells U.S. breakfast show Good Morning America, "He's a longtime friend of our family. Everybody loves to assume things, but no."

She adds, "I'm not (in a relationship). I'm truly focusing on my career. If it (love) comes it comes."