The 14-year-old actor-rapper's relationship with Jenner has been the centre of speculation ever since they were spotted holding hands at a Justin Bieber concert in London last month, reported E! online.
"Jenner is one of my best friends. It's pretty awesome. I was in Los Angeles, we were all hanging out. Then I went to New York and she came too, then she came to London and surprised me, so that's pretty baller," Jaden said.
Meanwhile, the "Karate Kid" star will feature with his father in M Night Shyamalan directed science fiction thriller "After Earth".