It took no effort at all for these co-stars to find chemistry.
Chris Hemsworth and wife Elsa Pataky are working together for the first time in the upcoming war film, Horse Soldiers, and ET got Chris to open up about the experience.
"It is great," Hemsworth told ET's Cameron Mathison on the New Mexico set. "Very little prep time needed to form that chemistry. It was fantastic."
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What's more, with the kids (India, 4, Tristan, 2, and Sasha, 2) back in Los Angeles with their grandparents, Chris and Elsa's days filming felt like a "working holiday" for the couple.
Hemsworth revealed how the idea for the family work environment came about, saying, "They said, 'Look, we are big fans of your wife, and we would love it if she came and played your wife in this,' and I said, 'Great!'"
Horse Soldiers, based on Doug Stanton's non-fiction book of the same name, follows a group of U.S. Special Forces sent to Afghanistan to fight against the Taliban after the attacks of September 11, 2001.
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The film's title stems from the fact that horses were the troops' main mode of transportation, but fortunately for Hemsworth, he was able to draw on previous experience.
"We did a little horse shooting in the first Thor," he pointed out. "I also had the best horse, Carly. I would tell them it was my horsemanship and my skill, but it was not that."
And while New Mexico is safer than Afghanistan, Mathison got a small taste of the real thing while witnessing an action sequence is the desert.
"An incredible firefight is going on right behind me," Mathison shouted over the sound of simulated gunfire. "I got to keep my head down. It's getting loud out here."
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Hemsworth revealed that the cast went through a three-week training program before they began filming in order to form a bond between them and get a real sense of what it's like to rely on each other in the battlefield.
"It was a lot of weapons training, a lot of movement training," Hemsworth said. "It was great, because you can't really fake this stuff."