Prince harry and kate

Prince Harry and Kate Middleton have one of the closest relationships of any in-laws around, and these adorable photos are proof.

He had his sister-in-law grinning ear-to-ear when he joked around during the 2014 Trooping the Colour festivities.

Prince Harry and Kate Middleton have one of the closest relationships of any in-laws around, and these adorable photos are proof.

Prince Harry and Kate Middleton have one of the closest relationships of any in-laws around, and these adorable photos are proof.

Although Kate Middleton has shared plenty of memorable moments with her other half, Prince William, over the years, she's also had some sweet and hilarious

Prince Harry and Kate Middleton have one of the closest relationships of any in-laws around, and these adorable photos are proof.

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Prince Harry is always cracking up Kate Middleton when they attend events together.

Prince Harry and Kate Middleton have one of the closest relationships of any in-laws around, and these adorable photos are proof.

Prince Harry is always cracking up Kate Middleton when they attend events together.