The whole process of making the next great Marvel movie isn't as fun as we all think.

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In an interview with The Telegraph on Sunday, Idris Elba, who plays Heimdall in the Thor series, talked about moving from his role as Nelson Mandela in the little-seen Mandela: Walk To Freedom to doing re-shoots for Marvel's Thor: The Dark World.

"It was really weird. I'd just done eight months in South Africa. I came to England and the day I came back I had to do reshoots on 'Thor 2,'" he said.

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"And in the actual scene my hair was different, my...[deep sigh] I was like, 'This is torture, man. I don't want to do this.' My agent said: 'You have to, it's part of the deal.'"

He went on to talk about the process of putting in heart and time for a movie only to have to move on to one that he finds to be soulless.

"I'm actually falling down from a spaceship, so they had to put me in harness in this green-screen studio. And in between takes I was stuck there, fake hair stuck on to my head with glue, this f---ing helmet, while they reset. And I'm thinking: '24 hours ago, I was Mandela,'" Elba said.

"When I walked into the set the extras called me Madiba. I was literally walking in this man's boots. [Within] six months, the crew, we were all so in love with this film we had made. I was him. I was Mandela, practically. Then there I was, in this stupid harness, with this wig and this sword and these contact lenses. It ripped my heart out."

Heimdall will be seen in Avengers: Age of Ultron in a brief scene before returning for Thor: Ragnarok in 2017.

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Thor 3, Movies, Idris elba