The two actresses recently met up for a round table discussion organised by a leading entertainment magazine and Hathaway, 30, told the veteran about the project, reported Daily Express.
"You don't know this, but I tried to write a movie for you, about a spy. I thought, 'Sally would be amazing, because who would ever think she was a spy?'" she said.
After her brilliant performance in "The Dark Knight Rises", Hathaway will be seen next in musical drama "Les Miserables".