Kylie Jenner posts a sweet throwback of her and Kendall on Santa's knee and it's adorable. This image appears in the gallery:The 14 Celebrities Who Are Already Feeling Seriously Festive 2. Kylie Jenner posts a sweet throwback of her and Kendall on Santa's knee and it's adorable. The two Jenner sisters were SO cute. Picture: Instagram 14 images See the full gallery: The 14 Celebrities Who Are Already Feeling Seriously Festive