Anderson, 39, lost total functionality of her mouth while filming of The X-Files: I Want to Believe movie in Canada, when she got frostbite. "There were scenes where we had a lot of dialogue. And when you're in that kind of weather and the wind is blowing and the snow is coming down, your lips actually do freeze. My mouth wouldn't work at all," Daily Star quoted her as saying.
Anderson previously admitted that she found the physical demands of the new X Files movie extremely taxing. Anderson, back as Agent Dana Scully for the film, admitted that she was nowhere as agile as her athletic co-star David Duchovny.
"It was hard work, I'm too old for this. David's in the best shape of his life and did most of the work. He's climbing and jumping off cliffs. I was more exhausted by the end of it than he was. I'm a wimp," she added.
The movie hits theaters this August.