Lily James says she had become "obsessive" with using the typewriter to prop for her role of Elizabeth Layton in the World War II drama, "The Darkest Hour".
The 28-year-old actor, who played personal secretary to Gary Oldman's Winston Churchill in the film, said she took typing lessons for six weeks.
"It's a real skill. I actually did six weeks of lessons. I had this wonderful lady come round and she was very diligent and I asked for a typewriter for Christmas.
"They (typewriters) are hard, with the keys there is a lot of pressure and my fingers got really muscly and I became really obsessive, I sort of thought if I could get the typing right it will be fine, all my anxiety went into the typing," James told BANG Showbiz.
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