Desperately seeking Keira: Can she look any skinnier?

The 22-year-old actress looked skinnier than ever as she made an appearance at a film premiere in Toronto.

Seen at the premiere for period drama "Silk" at the Toronto film festival, the 22-year-old actress wore a white empire-line tunic dress with short sleeves, which did little to hide her bony frame.

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Desperately thin: Actress Keira Knightley looked even skinnier than she did at her recent appearance at a film festival

Last month at the Venice Film Festival, Keira's rail-thin frame drew intense scrutiny.

The Pride and Prejudice star who adamantly denied reports of an eating disorder last year, looked shockingly gaunt as she posed for photographers in a full length white and navy gown.

Keira swears she is "naturally thin", and has admitted she hates the attention which is directed at her appearance, but in an interview in the latest edition of Vogue, admits she is trying to 'have her cake and eat it' by taking her clothes off for advertisers while at the same time demanding privacy.

She told The Sunday Times: "I mean, I'm an actress and it's a tool, after all.

"It's pretty much all I've got. I've got whatever's in my head, my face and my voice and then there's my body, and that's it. And I do trade on that, of course I do."

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Oscar nominee Keira admits she uses her body as a tool to aid her career as an actress

Keira has in the past been brutally honest about her body shape, particularly her lack of cleavage which was famously airbrushed for a film poster.

She told Vogue magazine: "When I was 17, 18, 19, I felt incredibly insecure.

"I went through a period of thinking I looked weird and too skinny, and that's ten times worse when you're being written about."

Keira is tipped for Oscar glory for her role in film "Atonement," the screen adaptation of the beloved Ian McEwan novel which reunites her with "Pride and Prejudice" director Joe Wright.

"Silk" is scheduled to open at the end of October.