She said: "I'm gonna sound like an idiot, but when you're watching an action movie and you're like, 'Oh cool, special effects.'
"Then you're doing it and you're like, 'Oh. I actually run. I actually fire the guns and I run, brilliant, OK, I should probably get better at running.' I did a fair few of the stunts."
The Game of Thrones star, who plays Mother to Dragons, Daenerys Targaryen. found herself better suited to some stunts than others.
She said: "My driving is pretty reckless anyway so the whole crashing every single vehicle I got into was apt, it made sense."