The two met on the sets of their Oscar winning movie and have been going out for three years, after walking the world's red carpets together for the hugely successful film.
"I don't think something like a 'Slumdog' could be repeated by the two of us, only because the expectations that were built on that project were so high.
And I know that it would be difficult to live up to those expectations," the Independent quoted her as saying. "If it were a comedy, or maybe a dark comedy, I'd be interested in trying that out with him," she said.