And it's none other than his ex wife Kris Jenner!
According to a source:
[Image via WENN.]
"I was taking a piss at V Festival and one of the actors from Game of Thrones came and took a piss next to me and I was like, 'this is awesome!' So then we hung out for the night. And then I was in New York in a hotel and I was taking a piss and one of the actors from Game of Thrones, another one, came up and took one. So, basically, whenever I urinate, I meet actors and get starstruck."