In scenes broadcast on ITV last night (19 December) the prince joined in the fun without reservation.
Proving that Wills has still got a sense of humour - despite having two small children and another on the way - by joining in with one of Miranda's favourite activities, galloping.
The cast of Annie appeared on stage, and one little girl had a question for the future King of England.
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Next to him, pregnant wife, Kate Middleton, burst into laughter and viewers at home did pretty much the same thing, praising the dad-of -two for being a "good sport".
Never let it be said that Prince William doesn't do what the British public demand from him - as on Tuesday night he stood up from the Royal Box at the London Palladium and galloped. "Always a great sport".
The comedian couldn't resist an opportunity to make Prince William cringe.
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"Only Miranda Hart would be able to get Prince William to gallop #RoyalVarietyPerformance", another added.
On the night many acts including Paloma Faith, Leading Ladies, Seal and Britain's Got Talent victor Tokio Myers performed.
When the humorous 34-year-old royal was at the Royal Variety Show, he was happy to play along and demonstrate what can only be described as a very important dad dancing like a horse.
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