Megastar Shah Rukh Khan is celebrating his 51st birthday today. King Khan has surely come a long way in his journey of Bollywood. The fan following of SRK across the globe is immense and it seems that 2nd November is not just a day for his fans, but it is a festival. Since the clock struck 12, birthday messages for Badshah of Bollywood started. The social media went crazy for the superstar and wished him Happy Birthday. #HappyBirthdaySRK has been trending on Twitter since last night and the Twitterati across the globe have wished King Khan on his 51st birthday. One of Shah Rukh Khan’s best friend and filmmaker Farah Khan took to twitter and posted a lovely birthday message with a photo collage.