The actors arrived back in India after completing the first schedule of their upcoming Yash Chopra film, the Daily Mail reports.
"Shah Rukh and Katrina chose to leave from the main exit gate, which was strange. They could have left from the private exit meant for VIPs," stated an eyewitness.
"It could be that the film's publicists want the two superstars to be seen together frequently before the release."
Khan spoke briefly to the press before leaving the airport bound for his Mannat residence, telling the media: "We had a great time shooting."
He also refuted rumours that the title of the film had already been officially announced: "It's not true. The name isn't London Ishq."
The project, which also stars Anupam Kher and Anushka Sharma is scheduled to release in November.
> Read Digital Spy's Katrina Kaif interview here