There will only be one Indiana Jones for famed director Steven Spielberg, and that actor is none other than Harrison Ford.

"I don't think anyone could replace Harrison as Indy, I don't think that's ever going to happen," he said during an interview with Screen Daily.

Earlier this year, there were reports that the role of Indiana Jones will be passed on to "Guardians of the Galaxy" star Chris Pratt. Pratt has denied that any offer came his way, and Spielberg is also denying the speculation.

"It's certainly not my intention to ever have another actor step into his shoes in the way there have been many actors that have played Spider-Man or Batman. There is only going to be one actor playing Indiana Jones and that's Harrison Ford," he stressed.

There have already been four "Indiana Jones" films, starting with "Raiders of the Lost Ark" in 1981, "Temple of Doom" in 1984, "The Last Crusade" in 1989, and "Crystal Skull" in 2008. Collectively, all of the movies earned nearly $2 billion in worldwide box office. But the least successful of all these movies is the last film "Crystal Skull," which disappointed both critics and fans.

Because of this, many are wondering why Spielberg would want to do another "Indiana Jones" film.

"Because there are more adventures out there than films," he answered. "So as long as there's more adventures out there, I've got a bullwhip, a fedora, a leather jacket and a man on a horse who knows how to get the job done."

Just recently, Spielberg teamed up with another veteran actor Tom Hanks to do the film "Bridge of Spies," which centers on the negotiation attempt made by James Donovan to free a United States pilot.

Spielberg chose to shoot on film, even though many other directors are using digital cameras. He explained why: "If it is a straight story, without any benefits of new technology, there's no reason to shoot anything digitally."

"The outcome digitally looks like the difference between a painting with acrylics and a painting with oils," he further said. "Film is textural and had a kind of velocity in the grain count alone where digital is as clean as looking through a pane of glass at the outside world and to me it's almost too vivid, too vibrant, too real."

Historical films, in particular, need "a bit of veil between the here and now," said Spielberg, adding that "as long as we have film, why not shoot with the real stock?"