Summer Glau

She had not actually seen the Terminator movies before being cast in Terminator: Las crónicas de Sarah Connor (2008).

My favorite thing about River [her character on Firefly (2002)] is that she gets to be barefoot so much of the time. I don't like shoes very much. The more things I mention the more things she ends up doing, I remember in the first episode I was thinking, "I really think River needs a gun", and then by episode 10 she got one. I'm working my way up to captain.