Back to The Future and Forest Gump director Robert Zemeckis has said that his new movie, World War II romantic thriller Allied, is only being called "old-fashioned" because it's not a sequel or a part of a superhero franchise. 

In the film, which has just been released in Irish cinemas, Brad Pitt and Oscar-winning French actress Marion Cottilard play two spies who pose as a married couple in Vichy-controlled Casablanca while on a mission to assassinate the German ambassador.

Speaking to RTÉ Entertainment, Zemeckis said: "It's interesting because what's happening is that the term `old-fashioned' is being used to describe original ideas. I don't know if that's good or bad.

"Personally as a filmmaker, I think it's bad but what I think when you say it's an old-fashioned idea for a movie, what it means is that it's not based on a pre-sold title or a comic book. It's an original idea that a screenwriter wrote."

Zemeckis also laughed off the idea that certain scenes in Allied were a homage to wartime movie classic Casablanca. "No! Obviously those two scenes - the opening scenes take place in Casablanca and there is a scene later with a piano - but they were always in the draft of the screenplay and I think it's a stretch to think that's some kind of echo of the original Michael Curtiz movie."

Marion Cottilard talks to RTÉ Entertainment about working with PItt and that love scene in Allied

Read our review of Allied here

Read all about Brad's war fetish in his top war flicks EVER!