Last night, Ranbir Kapoor threw a bash at his grandmom’s house in Chembur. The actor starts shooting for his super hero film Dragon today and he’s all prepped to give it his all. So before diving into this special project with his BFF director Ayan Mukerji, RK decided to let his hair down and party with his pals. He was joined by Ayan, Sidharth Malhotra and his sisters Karisma Kapoor and Kareena Kapoor amongst others. They partied away till 3 am. Several fans of Ranbir Kapoor even climbed the railings of his house to catch a glimpse of the stars. Here’s a picture clicked by one of the onlookers.