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We have fallen in love with Prince Harry all over again!

The youngest prince just couldn’t hold back his laughter and showing off his goofy side while encouraging runners to join the Royal Family’s efforts to support Heads Together.

“Congratulations if you’ve got a place in the Virgin Money London Marathon,” Prince Harry said. “I hope the first-timers amongst you are more excited than scared.”

He also explained the importance of Heads Together and how much it means to him, his brother Prince William and his sister-in-law, Duchess Kate.

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“Everyone runs the marathon for a different reason and for fantastic causes,” he said. “If you already have a place and are undecided for who to run for, William, Catherine and I would like to invite you to run with Heads Together […] Together, we can start the biggest ever national movement to end stigma on mental health and change the conversation for everyone.”

“The three of us can’t wait to cheer you on. See you on the finish line,” he said at the end of the video as he put on a blue Heads Together headband and burst into laughter.

(h/t PEOPLE)

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