Harry vs. Kate Middleton: Duke teases her with new video.

Prince Harry was in a video for the group WellChild, which helps seriously ill children and their families.

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Harry has been a patron of the organization since 2007.

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He is appealing for inspiring children to join WellChild.

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Harry's message comes days after Kate Middleton launched her new 'Shaping Us' childhood campaign.

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Harry may be following Kate's lead or teasing her by posting about a topic near to her heart.

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Harry expressed his gratitude for the work that WellChild does.

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He requested nominations for the 2023 WellChild Awards.

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Harry invited people to nominate someone remarkable for the award and promote the charity.

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He looks forward to meeting with the award winners each year.

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