【Semi-dokyumento: Tokkun Meiki Dukuri】

Once upon a time,Semi-dokyumento: Tokkun Meiki Dukuri the very idea of hurling anything at a member of the royal family would have landed you in the Tower of London on the charge of high treason.

But things could not be more different in 2017. The royal family are like, totally cool now. So cool, in fact, that you can squirt them with water and they'll love it.

SEE ALSO: Why Prince Harry and Prince William are truly the millennial royals

That's what happened at the London Marathon as William, Kate and Harry cheered on runners from a water station.

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Credit: Mark Cuthbert/UK Press via Getty Images

One cheeky marathon runner -- whose identity is not known -- squirted the future king with water.

Just look at the sheer delight of Will's face...

Credit: Max Mumby/Indigo/Getty Images)

Kate looked highly amused as water rained down on Will's face and clothes.

Credit: Max Mumby/Indigo/Getty Images

Anyone got a towel?

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