Bollywood super duper actor Salman Khan carved the image of the quintessential romantic hero with the second movie and first blockbuster of his career, Rajshri Productions `Maine Pyar Kiya`. And since then, there has been no looking back for the Salman Khan – Sooraj Barjatya relationship. After long, the duo decided to collaborate once again for yet another family drama `Prem Ratan Dhan Payo`.  Since the movie has already gone on floors in Mumbai, Salman decided to celebrate Sooraj`s birthday on the film set. Salman, along with his co-star in the movie Anupam Kher organized for a surprise bash on the sets of the movie. It was a simple cake cutting ceremony with all the technicians and assistant directors making the occasion memorable.