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Would you be fooled by these royal look-alikes?

The look-alike royal couple spent part of the day roaming around London to promote Alison Jackson's, "Kate & Wills Up The Aisle: A Right Royal Fairy Tale," a photographic book depicting models posing as members of the British Royal Family preparing for the forthcoming Royal Wedding. Read more on the Royal wedding here.

Jonathan Short / AP

Impersonators Mary Wills as The Queen, left, Simon Watkinson as Prince William, center, and Jodie Bredo as Kate Middleton, right, pose outside of a church in London on Friday April 1, 2011. Jackson became well known in 1999 with a book showing photographs of celebrity look-alikes in compromising positions.

Kerim Okten / EPA

Look-alikes of a royal footman (L), Prince William (2-R) and his bride-to-be Kate Middleton (R) react when a street artist look-alike of Charlie Chaplinon on Friday.

Kerim Okten / EPA

Look-alikes of Britian's Prince William (C), his bride-to-be Kate Middleton (R) and Queen Elizabeth II (L) walk by a casino on Friday.

Geoff Caddick / AFP - Getty Images

Lookalikes of Britain's Queen Elizabeth II (L), Kate Middleton (R) and Prince William arrive on Piccadilly in central London on Friday.

Danny Martindale / Getty Images

Prince William and Kate Middleton look-a-likes eat chicken in the window of KFC Leicester Sq. on Friday.

A carriage carrying Prince William and Kate Middleton look-a-likes passed through the streets of London for a book promotion. TODAY.com's Dara Brown reports.