"It's a beginning. Every new film helps us to mount the steps," he said after a screening for the press at the downtown Empire Leicester cinema.
In London for the gala red-carpet premiere, besides Khan, is the film's debutante female lead Deepika Padukone, co-stars Arjun Rampal and Shreyas Talpade and distributor and Eros International chairman Kishore Lulla.
This was the first time an Indian film had premiered at the Empire at Leicester Square - home of all London movie premieres, Khan said.
He said London was the perfect launching pad for the film because of the history of "cultural cross-pollination" between India and Britain.
"I have always thought that we should be taking the first steps to bring out India's economy and culture to the world," he added.
Lulla said: "This is one of the most awaited films of the year and we are excited to be leveraging Eros's global distribution in promoting the film."