The 24-year-old actress, who has been cast as heroine Kelsea Glynn in the film, is being properly trained to do all the stunts of her own, reported Contactmusic.
"With Emma, it's hard to be that plain, but she'll be playing someone who has a physicality." a source said.
The actress will be stripped of make-up and transformed into a more realistic, athletic heroine, according to the source.
Watson is apparently learning how to saddle up and will receive several weeks of combat training, knife work and swordsmanship.