Kate Middleton and Prince William Challenge Each Other to a Boat Race -- Find Out Which Royal Won!

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It's a battle of the royals!

Kate Middleton and Prince William put on their game faces on Thursday as they took part in a rowing regatta during their three-day visit to Germany.

WATCH: Kate Middleton Shows Off Summer Haircut at Wimbledon Ahead of Royal Tour of Poland and Germany

The race took place in the southern German town of Heidelberg, and judging by the pics we've seen, it appears the two were having a blast.

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Middleton looked every bit the part, chic in a powder blue striped top, skinny jeans and oversized sunglasses, while her husband kept cool in a matching blue dress shirt, pants and sneakers.

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The Duke and Duchess of Cambridge were on opposing teams, and although it appeared to be a tight race, it was Prince William who came out on top.

Watch it all go down in the social media posts below:

But the fun didn't stop there! After the race was over, the lovebirds celebrated with giant-sized mugs filled with beer.

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WATCH: Kate Middleton and Prince William Enjoy a Pint of Guinness For St. Patrick's Day

This reminded us of all the fun the two had this past St. Patrick's Day. More on that in the video below!