Princess Eugenie has been having great fun on holiday in Spain, with pictures showing her trying on fun fancy dress and laughing with a mate.
The 20-year-old - who is to return to her studies at Newcastle Uni soon - has been off on her jollies with Tilly Standing, her good pal and daughter of thespian Sir John Standing.
On a day out, they spotted a costume shop and promptly went in to try on fake bottoms, happily posing for pictures with the humourous accessories.
It's clear the young royal likes a good joke, although she has recently admitted she's not much of a wild student and often stays in studying.
However, fake bottom outfits like bum shorts fancy dress would be great to take back to Tyneside for costume parties - they are sure to turn a few heads!
Well-known japester Prince Harry would be proud of his cousin…