A spokesman for Kensington Palace said: "This photograph captures a very happy moment on what was a special day for The Duke and Duchess and their family. They are very pleased to share this picture as they celebrate Prince George's second birthday."
Prince George and William in an official portrait by Mario Testino.
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Kate and Charlotte in an official portrait by Mario Testino.
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Kate, William and Charlotte in an official portrait by Mario Testino.
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George and William in an official portrait by Mario Testino.
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The family in an official portrait by Mario Testino.
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William, Kate, George and Charlotte at Charlotte's christening, July 2015.
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The Royal family at Charlotte's christening, July 2015.
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George during Charlotte's christening, July 2015.
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Charlotte.
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George during Charlotte's christening, July 2015.
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William, Kate, George and Charlotte at Charlotte's christening, July 2015.
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William and George during Charlotte's christening, July 2015.
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George during Charlotte's christening, July 2015.
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The Royal family at Charlotte's christening, July 2015.
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William, Kate, George and Charlotte at Charlotte's christening, July 2015.
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William, Kate, George and Charlotte at Charlotte's christening, July 2015.