EXCLUSIVE: Behind the Scenes With Mark Wahlberg as 'Transformers: The Last Knight' Lays Waste to Stonehenge

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ET was on the set of Transformers: The Last Knight, where Mark Wahlberg put us in the middle of all the action as the cast and crew prepared a scene at Stonehenge in which they blow up a replica of the prehistoric monument.

"It gets crazier and crazier every day we go on," Wahlberg told ET's Cameron Mathison over the sound of helicopters soaring overhead.

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In the fifth Transformers film, we catch up with Wahlberg's character, Cade Yeager, a couple years after the big battle in Chicago. Now a man on the run, Yeager finds himself being dragged to England, where he meets up with new characters played by Laura Haddock and Isabela Moner.

"It's a very different journey," Wahlberg said. "A lot of stuff about the origin of Transformers and their history."

In addition to Haddock and Moner, Sir Anthony Hopkins has also joined the cast this time around, showing a side of himself we've never seen before on film.

"He's having so much fun," Wahlberg said of his new castmate. "He doesn't get to do that much action stuff, so he's got a lot of energy and a lot of enthusiasm. And to see a guy his age with that much energy and that prepared -- he's got a lot of dialogue with a lot of information -- it's exciting to see."

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Mathison got to see Hopkins' enthusiasm firsthand when he caught up with the 78-year-old Oscar winner on the set.

"It's fantastic! I've never been in a movie like this one," Hopkins shared. "This is colossal."

As a U.K. native, Hopkins remembered visiting Stonehenge as an 8-year-old boy with his father.

"It's come full circle," Hopkins said.

Along with a bevy of newcomers, fans will see some familiar faces as well. Josh Duhamel returns to the franchise, and despite working with Wahlberg before, is still amazed by his work ethic.

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"He gets up every morning and plays 18 holes of speed golf," Duhamel told ET. "When we started the movie, I said, 'I got to do that with you.' He said, 'We get up at three and work out. Then we play at five.' I'm like, 'I'll check you on weekends.'"

Duhamel did get some time on the links when he played the legendary St. Andrews golf course in Scotland.

"I had a little trouble in the sand trap," he admitted. "I said, 'These bunkers can't be that hard to get out of.' Seven shots later, I couldn't get out of the sand trap."

Transformers: The Last Knight opens June 23, 2017.