The Elysium star plays Rebel Alliance Captain Cassian Andor in the new Star Wars spin-off film, and in addition to the intelligence analysis training, he also put his fitness to the test to make his action scenes as believable as possible.

"My character's a captain, an intelligence officer, so I had to do a lot of military training to understand how the mind of someone in the military works," he explained, "because I'm supposed to keep this team together through the mission, and I know nothing about war... I had to do a lot of research."

"It was a lot of fun," he added on U.S. breakfast show Good Morning America. "Just the physical training (was exciting), to be able to do the stuff we made (in) this film, because there was no, 'The double will do that.'"

Diego, who was a huge fan of the George Lucas films as a kid, sustained a few injuries during the shoot, but he has no regrets because he now has plenty of stories to tell from his time on set.

"It's a Star Wars film, you want to go for it, right?" he smiled.

The Mexican star appears alongside Felicity Jones in Rogue One: A Star Wars Story, which is described as a prequel to 1977's Star Wars: Episode IV - A New Hope, the very first release in the blockbuster franchise.

The film has already proven to be a hot ticket for fans, with excited movie-goers helping Rogue One secure the second-highest first day of pre-sales in U.S. box office history after tickets were released on Monday (28Nov16). Star Wars: The Force Awakens set the record last year (15).

However, despite the early success, studio officials have no plans to make a sequel to the spin-off movie.

LucasFilm President Kathleen Kennedy confirms the news in a new interview with Empire Magazine, with visual effects artist John Knoll adding Rogue One was always envisioned as a self-contained project.

According to, Rogue One director Gareth Edwards also jokes about a second installment in the article, claiming, "That sequel will be directed by George Lucas" - a reference to Star Wars: Episode IV.