11 Celebrities Looking Completely Awestruck By Royalty (And Vice Versa)

One must remain dignified and keep a stiff upper lip at all times, probably reads the age-old rules of royal etiquette. And absolutely no touching.

But even celebrities can slip up occasionally with all the excitement of meeting royalty. And the same can also be said of certain members of the royal family too. (We're looking at you, Queen Elizabeth II, while curtseying, obviously.)

Here's 11 stars looking completely awestruck in front of Kate Middleton and co, and vice versa.

From: Harper's BAZAAR US

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Cara Delevingne meets Prince Charles and Camilla

Being spawn from aristocratic stock means Cara can guffaw as wide-mouthed and haughtily as she likes. (Plus, Camilla probably just shared a cracking gag.)

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Cara Delevingne

Reese Witherspoon meets Kate Middleton

Kate's so getting an invite to Reese's place in the Hamptons. Photo: Getty

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kate middleton

Keanu Reeves meets Princess Beatrice

Keanu's keeping cool as a cucumber (as usual), but Eugenie has gone as red as her frock. Not that we can blame her. Photo: Getty

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Keanu Reeves

Beyoncé meets Kate Middleton

Queen Bey is basically royalty, so meeting the Duchess was no biggie. Photo: Getty

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Kate Middleton

LeBron James meets Kate Middleton and Prince William (and breaks the no-touching rule)

Forget that he's clearly breaching protocol with the cosy hug - those sweat patches should not be touching that expensive dry-clean only coat... Photo: Getty

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Kate Middleton

Leonardo DiCaprio and Princesses Beatrice and Eugenie

A very, very young Leo looks completely nonplussed by meeting two princesses, but the same probably can't be said for Eugenie and Beatrice. (Watch that hand, Bea.) Photo: Getty

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Leonardo DiCaprio

Jennifer Garner meets Kate Middleton

We've just found ourselves the perfect actress to play Kate Middleton in a future biopic. Photo: Getty

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Jennifer Garner

Nicole Kidman meets Prince William

"And my dance moves went a bit like this..." Photo: Getty

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Prince William

Tom Cruise meets Prince Philip

Chill out Cruise, it's not like you're meeting royalty or anything. Photo: Getty

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Tom Cruise

Jennifer Lopez and mother Guadalupe meets Kate and Wills

Because even famous people can sometimes be a little embarrassed by their parents. Photo: Getty

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Kate Middleton

Kanye West and P Diddy meet Prince Harry

We'd buy their music. Photo: Getty

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KAnye West