Prince Charles shares unseen photo of Prince William and Harry

Prince Charles' message read: "Wishing everyone a very Happy Father's Day!"

Prince Charles, the heir to the British throne, delighted royal fans with an adorable photo of his sons Prince William and Harry on Father's Day.

Clarence House posted Prince Charles' message on Instagram and Twitter handles simultaneously.

The photos also included the late Prince Philip and Camilla along with her father Bruce Shand on his return.

In the third picture of the series, Prince Charles can be seen enjoying quality time in the garden with William and Harry.

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