Kristen Stewart used to be “such a little psychopath”.

The 22-year-old actress shot to fame when she took on the role of Bella in popular vampire franchise Twilight.

Despite initially struggling with the media attention, Kristen has now got used to the Hollywood lifestyle.

“Am I more suspicious of people [now]? I think I started off that way, but now I’ve gotten to a really great place,” she told the British edition of OK! magazine

“I feel a hundred percent unguarded. I was such a little psychopath before, but I can relax now.”

Kristen’s personal life has also been well-documented in the media.

Her relationship with Twilight co-star Robert Pattinson hit headlines this year when Kristen admitted she had an affair with married director Rupert Sanders.

The star doesn’t let the negative comments affect her and says it’s important not to worry what other people think of you.

“You should probably be a bit more concerned about how you feel about yourself,” she explained.

“It sounds completely cliché, but it’s true, so you probably shouldn’t think about it.”

Kristen and Robert are rumoured to have rekindled their romance and have been spotted out together on numerous occasions.

The pair are currently also busy promoting the final instalment of Twilight, Breaking Dawn – Part 2.