On Monday,a bit of very hush-hush post-completion extra-special shooting for Sajid Khan, who's much-talked about take on Leonard Nimoy's Three Men & A Baby entitled Heyy Babyy is being readied for release.

However, there was one song, accompanied by a few comic scenes left. Says a source, "Sajid wanted Shah Rukh to make an appearance in his directorial debut. After all, his sister Farah Khan has directed both her films with SRK in the lead. When Sajid requested Shah Rukh to put in a guest appearance in Heyy Babyy, SRK agreed without a second thought. His only condition was that Sajid would have to wait until SRK returned from his family holiday in London."

The minute SRK returned to Mumbai he allotted the dates to the anxious debutante director.

From Monday, SRK's comic scenes and songs with Anupam Kher were shot at Film City. Apparently Sajid has tried to create the same chemistry Anupam and Shah Rukh had created in Aditya Chopra's Dilwale Dulhaniya Le Jayenge, Mahesh Bhatt's Chahat and Amol Palekar's Paheli.

Says the source, "The crew was in splits watching the duo's antics. The unit had a ball on Monday at Film City. Anupam and Shah Rukh added to Sajid Khan equalled a laugh riot. Loud laughter and grand guffaws kept emanating from the studio floors where they were shooting."