Charlie Hunnam says he and Robert Pattinson were not mates while filming their new movie

There was a real distance between us..

Charlie Hunnam and Robert Pattinson’s new film The Lost City of Z should have been the perfect environment to forge one of the hunkiest bromances of all time, instead they had trouble making friends on set, says Charlie.

At the Berlin Film Festival the former Son’s of Anarchy star opened up to the Screen Daily about the icy reception he says R-Patz gave him and how there was a ‘real distance’ between them.

“I had a couple of rehearsal sessions with Sienna [Miller], but I didn’t spend any time with Tom [Holland] or Robert,” Hunnam told the Screen Daily.

“I wanted these relationships to evolve naturally on screen. Through the work, I don’t think I said more than ten words to Robert [Pattinson] off camera,” he added.

“I didn’t know if he was just ‘in that zone’ or if he genuinely didn’t like me,” Hunnam said.

But the SOA star did say the frosty relationship gave their characters the “right dynamic on screen” and added that since the film wrapped Pattinson, 30, had been going to great lengths to be pals.

“He’s reached out to me subsequently, making overtures for us to be friends now, so I think it was about the work,” Charlie said.

In the film, due out next month, the two British actors are portraying fictional 1920s explorers who lose their way in the jungles of Brazil. Obviously the plot doesn't make the characters' journey sound like a cake walk so the subject matter made for a grueling set experience. Pattinson has maybe eluded that he wasn't down to make bros because he was just hangry the whole time.

The former Twilight star told PEOPLE that the cast was put on a meager one-meal-a-day diet so they could physically portray their starving characters.

“I had literally eaten nothing for the entire time,” R-Patz said, “I loved it afterwards, for like a week in London, where I have a 28-inch waist. I was like, ‘Ooh! Skinny jeans!'”

You can see the trailer for the film below...