'A**hole' Natalie Portman

source: people.monstersandcritics.com

Natalie Portman has confessed she is an "a**hole" to work with.

The 'Closer' star is convinced she upsets most of her co-stars because she never makes an effort to befriend the cast and instead chooses to focus on her acting.

Natalie said: "I must be an a**hole when I work because I don't really make friends! I don't like to get caught up in partying scene and find it really important to have my own personal space on set."

Despite her unfriendly nature, the 26-year-old actress made an exception for her 'My Blueberry Nights' co-star, singer Norah Jones.

Natalie explained: "Norah is a sweetheart. It's rare that you meet people through work who you're like 'Oh my God I want to spend every minute with you!' I sincerely love her.

"She's so down-to-earth and such a lovely, genuine person."

Natalie Portman's chuckle trouble

source: people.monstersandcritics.com

Natalie Portman struggles to laugh.

The 26-year-old actress - who stars in children's Christmas movie 'Mr. Magorium's Wonder Emporium' - has difficulty making a laugh sound real on camera.

Natalie told the New York Times Style Magazine: It's much harder to laugh than cry. I find it so hard to fake laughing. I have no laugh except my own, and that laugh is very particular, very modern. It's hard to make any other laugh sound real. It's like sneezing: you really only have one sneeze."

The 'Star Wars' actress would much rather die onscreen.

She said: "I've died many times. I died in 'Closer', but they changed the ending and, miraculously, I lived. I also died in 'Star Wars: Episode III - Revenge of the Sith' and in 'Cold Mountain'.

"Death scenes are not more difficult than other scenes."

The star - who shot to fame aged just 12 in 'Leon' - is concerned she will forever be 11-years-old in the eyes of the movie industry, as that was when she was discovered by a talent agent in a pizza restaurant and "became who she is".

She fretted: "I was once told that the age you are is the age you were when you became who you are. Does that mean I am perpetually 11?

"I'm not sure I want to have that strict an image. In the movie business, there is such a temptation to stick with a particular persona. There is a kind of artistic branding."