Keira Knightly turned heads last night at the London premiere of new movie, The Duchess.

The skinny star stunned onlookers when she walked down the red carpet in an electric blue dress, proudly displaying her thin frame.

Black patent platforms added to her height, giving onlookers the impression she had skipped dinner, or several even.

Keira - who has always claimed that her size is natural - was out to prove to her fans that she’s quite happy with her ironing board body.

In a time where skinny is shunned and curves are cool, The Duchess star made sure people noticed her poise, beauty and confidence as she made her way down the red carpet with head held high.

The Duchess is loosely based on Diana’s ancestor and shares similarities with the Princess of Wales’ love triangle.