Kristen Stewart has debuted a shaved hairdo at the premiere of her latest film, Personal Shopper.

The Twilight actress took to the red carpet in Los Angeles to show off her new look, which also sees a change from brunette to platinum blonde.

Kristen Stewart attends the LA Premiere of Personal Shopper at Carondelet House in Los Angeles. (Shotwell/Invision/AP)

Her hairstylist Bridget Brager posted a photograph of the transformation on Instagram:

The actress, 26, showed off her lighter locks earlier in the week as she posed on the cover of V Magazine.

Reports say her dramatic new look may be for an upcoming film role.

According to Variety, she has recently signed on to star in thriller Underwater, which sees a crew embark on an ocean mission after a earthquake.

She would not be the first actress to shed her long hair for a film role.

Demi Moore famously shaved her head for her role in Ridley Scott’s 1997 action film GI Jane, while Sigourney Weaver did the same five years earlier for Alien 3.

Talking about her shaved head, Weaver told Starburst magazine she “felt colder most of the time, and other than that, I just felt lighter”.