The `Knight and Day` actress - who first came to fame on Jim Carrey comedy movie `The Mask` - admits she loves the "adventure" of being able to dress up and play different roles in various films.
She said: "You know what`s great about this job? You can be bald for a day. You can have a partner for a day. You can hang off the back of a motorcycle for a day.
"I love that, through my films, I can be someone other than me for a period of time. Who wouldn`t want to have that kind of adventure in life?"
The 37-year-old star also admits she is pleased to be reunited with Tom Cruise on `Knight and Day` after the intensity of their work on 2001 film `Vanilla Sky`.
She told the Scotsman newspaper: "That was a great movie, but pretty serious stuff. I was so excited to work with Tom again because I knew this would be a whole new world for us together. We could crack a smile, drive really fast and then run while things were blowing up."
`Knight and Day` is due for release in UK cinemas on July 2.