Kristen Stewart’s stylist worried that Karl Lagerfeld was going to kill her when the actress cut up a Chanel T-shirt.

Fashionista Tara Swennen has worked with the Twilight actress for over a decade, so has of course been on hand to help Kristen out with her Cannes Film Festival looks.

Rocking her new blonde, sheared hair do this year (16), the darling of Chanel has been putting her own spin on some classic clothes.

"We cut it that morning," Tara told telegraph.co.uk of the white cropped tee Kristen recently wore with a Chanel pencil skirt. "I would easily say about seven or eight inches. It always makes me cringe a little bit, like is Karl going to come kill me at some point. But it's a T-shirt, it wasn't that bad. We had a sweater option and it wasn't right with the weather, so we just decided to slash a shirt. It's very Kristen."

However the T-shirt worked so well, Kristen wore it again at the Opening Ceremony Gala dinner, teamed with a striped Barrie miniskirt and a pair of chequered Vans.

Since arriving in Cannes earlier this week (beg9May16) to promote new Woody Allen movie Cafe Society, Kristen has rocked more glamorous looks, including a sheer black Chanel blouse teamed with a floor sweeping skirt form the fashion house.

To add edge to the look, Kristen went for grungy black eyes and pillar box red lips.

Her hair stylist Adir Aberger, who was aiming for a Debbie Harry blonde with the new colour, adores working with the 26-year-old.

“Kristen is the most amazing collaborator - she gives you your freedom, but at the same time, she has a voice so she always looks like her,” Adir smiled.