The 33-year-old actress said she enjoyed trying something new with the more physical aspects of the story, reported Female First.
"I loved the action side of it because it's something I've never done before. I learnt how to do kung fu and now I've become obsessed with stunts and being on wires," Erso said.
"Rogue One: A Star Wars Story" is directed by Gareth Edwards and written by Chris Weitz, Tony Gilroy, and Gary Whitta.
The movie is set for a December release this year.
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