It's December, the official party season. With Christmas and New Year celebrations, people make merry around this time and why not? Who doesn't love partying in the chilly weather of December, as we start preparing to bid adieu to the running year. And when it comes to partying, Bollywood's filmmaker Karan Johar is known to be one of the best party hosts. The filmmaker has already kickstarted the month with a pre-Christmas celebration along with his protégés- Alia Bhatt, Varun Dhawan and Sidharth Malhotra at Sandeep Khosla's palatial abode.

Alia Bhatt, Aarti Shetty and Karan Johar. Image Courtesy: Karan Johar's Instagram.