Airport Diaries! Shah Rukh Khan, Alia Bhatt, Gauri Khan, Sidharth Malhotra all set to fly to London

Hottie Alia Bhatt boyfriend Sidharth Malhotra, Shah Rukh Khan and wife all set to fly this weekend, but nor they’re going there for a movie shoot or a vacation. All are heading there for a big celebration.  but it ain’t going to be like any other party! According to a report in a leading tabloid, a huge event is being organised in the British capital for Karan Johar, who celebrates his 44th birthday on May 25. And not just these four stars but many other friends of KJo are set to attend this huge bash!