Prince William, Prince Harry and the Duchess of Cambridge take part in royal race!

Prince William, Prince Harry and the Duchess of Cambridge showed their competitive sides as they took part in a relay race against each other for their mental health campaign, Heads Together. The trio were joined by around 150 runners who were training for the London Marathon at the Queen Elizabeth Olympic Park on Sunday.

Although Prince William pretended to have pulled a muscle prior to the race, jokily saying: "Oh my hamstring!", it seemed that all three were determined to win and readied themselves for the 50 metre sprint, with Kate even tying her long brunette locks back in preparation. While running to their relay team members, Prince Harry took the lead, glancing over at his older brother to make sure he was winning. It was a close call between the two brothers at the finish line while Kate came a respectable third, and the husband and wife happily hugged each other across after completing the race.

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Catherine, William And Prince Harry training with the #TeamHeadsTogether 💙

A video posted by Heads Together (@heads_together) on

The Heads Together campaign shared the brilliant video, writing: "Catherine, William And Prince Harry training with the #TeamHeadsTogether." They also shared a snap of the trio smiling mid-race, writing: "What an inspiring day with TRH and #TeamHeadsTogether - When we get our #headstogether we can achieve great things! Together we can end the stigma once and for all #mentalhealth."

The royal trio raced against each other

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The royal trio regularly attend events for their Heads Together campaign, and Prince Harry most recently visited the London Ambulance Service to speak to their staff about the importance of sharing difficult experiences on the job. Speaking about his own experience on the frontline in Afghanistan, he said: "You land and then hand them over and then are radioed to do something else. You never find out how that guy or girl recovered, whether they did recover or they didn't. I understand what you go through and thank God you have got each other." After listening to some personal stories, he added: "It shows the importance of talking. For you guys every day is different, you never know what you are going to get."

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