BAFTA: Kate Middleton flirting with William went viral.

A video of Kate Middleton and Prince William's BAFTA Awards PDA moment has gone viral.

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At the event, Kate is seen tapping William on the behind.

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On Sunday evening, the couple arrived at London's Royal Festival Hall for the awards ceremony.

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This was their first BAFTA Awards appearance in three years.

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Since 2010, Prince William has served as President of BAFTA.

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The couple was all smiles as they walked down the red carpet.

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The event drew a large number of royal fans.

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The couple did not attend the awards ceremony with their three children.

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