EXCLUSIVE: Matthew McConaughey Makes Fun of Idris Elba's 'Rear of the Year' Award

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Matthew McConaughey is getting cheeky about his co-star, Idris Elba’s, award-winning butt!

The Dark Tower stars sat down with ET on Sunday and addressed Elba’s recent Rear of the Year award.

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“He's got a trophy -- the ass of class,” laughed McConaughey, 47.

“Is this an English award?” he later wondered. “Is it an international ass?”

“It's not international, it's England,” replied Elba, 44. “I think I'm Rear of the Year in England.”

So, what does one do after finding out they have the sexiest butt under the Queen’s reign?

Check it out, of course!

“That morning when the announcement came out, I took a good look in the mirror and I was like, ‘Ok, fair enough,’” said Elba, before McConaughey broke into hysterics. “I don’t know … I don’t know what to say about that. I wasn’t expecting [it].”

The pair play enemies in The Dark Tower, hitting theaters on Aug. 4., and based on the novel series by Stephen King.

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The film comes three years after the hunky duo first met at the 2014 Golden Globe awards.

“[We] met in the loo at the Golden Globes, said ‘Howdy,’ shook hands and I said, ‘See ya down the road,’” recalled McConaughey.

Check out the trailer for The Dark Tower below.

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