Kristen Stewart has said she feels an "amazing responsibility" when she takes on film roles.
The Twilight actress, who stars in new coming-of-age movie On The Road, confessed to V magazine: "It's a pretty f***ing odd thing to want to pretend to be another person and then have a lot of other people who watch you do that."
The 22-year-old explained: "You have this experience of reading something, and if you don't bring it to life, you're basically deleting it.
"Every day of shooting you're depriving the world of having that. The responsibility is amazing."
Kristen plays teenage bride Marylou in On The Road, the big-screen adaptation of Jack Kerouac's cult novel.
She said of her character: "Until you really get to know the woman behind the character, it's difficult to connect the dots.
"I'm a contemporary, sensitive, normal girl, and it's difficult to try and empathize with someone who seems to have a lack of empathy. She seems a bit callous in the book."