Sidharth Malhotra, Alia Bhatt and Karan Johar

It is Ranbir Kapoor’s birthday today. The handsome hunk has been much in the news over the past few days, thanks to his pictures from London with Pakistani actress Mahira Khan that had gone viral on the internet. But RK is back in the city and hosted a bash for his pals from the industry on the occasion of his birthday. (Also Read: Ranbir Kapoor: I am tired of ‘Koffee with Karan’. I was forced this season)

[inline-gallery]

Check out the guests flocking in…