Diane Kruger looks painfully thin on red carpet

THE star has always been slight, but her appearance on a red carpet this week has shocked some.

Diane Kruger attends the "Sky" Paris Premiere. Picture: Bertrand Rindoff Petroff/Getty Images

ACTRESS Diane Kruger has raised eyebrows with her thin frame at a Paris film premiere this week.

The always-slender star appeared glamorous but even thinner than usual, clad in a chiffon Hugo Boss dress which showed off her arms and back.

The 39-year-old former model, who has been in a relationship with fellow actor Joshua Jackson for a decade, was attending the premiere of her new film Sky, a French-German drama about a woman, played by Kruger, who kills her husband while on holiday.

PARIS, FRANCE - APRIL 05: Actress Diane Kruger attends the 'Sky' Premiere at UGC Cine Cite des Halles on April 4, 2016 in Paris, France. (Photo by Marc Piasecki/WireImage)

Kruger has addressed talk about her thin frame in the past, explaining that she sometimes ‘forgets to eat’.

“I do watch what I eat, but not for weight reasons,” she has said. “It will sound really pretentious, but when I am really busy I will forget to eat. I try and avoid all processed food, too.”

PARIS, FRANCE - APRIL 05: Actress Diane Kruger, dressed in Hugo Boss, attends the "Sky" Paris Premiere at UGC Cine Cite des Halles on April 4, 2016 in Paris, France. (Photo by Bertrand Rindoff Petroff/Getty Images)

The Inglorious Basterds actress also says she avoids the gym, preferring to exercise outdoors:

“I only dance when I go out. For exercise, I tend to like the outdoors. In Paris, I rent a bike in the street and cycle around, and in L.A. I live up in the hills, so I go hiking a lot. I like to stay fit by being generally active.”

SKY' Paris Premiere at UGC les Halles on April 5, 2016 in Paris, France Pictured: Diane Kruger and Fabienne Berthaud Ref: SPL1258327 050416 Picture by: KCS Presse / Splash News Splash News and Pictures Los Angeles: 310-821-2666 New York: 212-619-2666 London: 870-934-2666 [e-mail]