Britain's Duchess of Cambridge has the "Grace Kelly" affect.

Duke and Duchess of Cambridge

Duke and Duchess of Cambridge

The 33-year old royal - who gave birth to her second child, Princess Charlotte, in May this year - is as "elegant" as the fashionable American actress who became the Princess of Monaco in the late '50s, according to TV presenter Holly Willoughby.

Holly, 34, gushed: "Look at the pictures from the christening, she's incredible. The way she just floated out in that white dress, pushing the pram. She was born for that role. She's so elegant and gracefull, as if she's from another time. She's got that Grace Kelly thing."

It's not the first time that the brunette royals have been compared.

In 2014 Grace topped a list of the most stylish brides of all time in a survey by Conde Nast.

However Duchess Kate - who at the Royal Wedding to Prince William in 2011 wore a white gown by Alexander McQueen's creative Sarah Burton, that was reminiscent of the winner's iconic gown - came a close second place.

Speaking in Hello! magazine, the 'This Morning' presenter named the British royal as the person she most admires and would like to interview.

She added: "If Kate Middleton (the Duchess of Cambridge) ever did a sit down interview, I would love to do it. I have such a fascinaion with her."