The Australian actor plays security force head Ashley Stubbs in the hit HBO science-fiction series, a role that will see him get in a scrap with Wood's character, artificially intelligent robot host Dolores.
However, he says the success of their fight scene was entirely down to the actress as she had to nurse him through due to injury.
"That was all Evan, she does stuff and I try to keep up," Hemsworth tells Variety. "It was a couple of days, I'd actually had surgery on my bicep, so I said, 'Whatever you do, don't kick me in the bicep.' So she kicked me in the face instead and that was fine."
The star was speaking at the season three premiere in Los Angeles, where all the stars appeared on the red carpet.
Tessa Thompson, who plays "Westworld" theme park executive Charlotte Hale says that season three will be a new beginning and story arc for the show.
"In a weird way, it feels like this is the premiere of the show again because we have entered the real world and the show continues to ask the question what it means to be human, but it's asking a host - pun intended - of new questions," she explains.
"We have lots of people that have come to join our cast, fresh blood, so it feels like the show is starting all over again. It's a show that surprises not just the audience, but surprised the people that are lucky enough to work on it."
"Westworld" season three will premiere on HBO on 15 March.