14/08/2014 16:59 BST | Updated 20/05/2015 10:12 BST

Prince George Official Photo. Eight-Month-Old Royal Pictured With Mum Kate And Prince William

Jason Bell/Camera Press via Getty Images

My, how Prince William has grown!

A beautiful, intimate portrait showing Prince George with his parents, the Duke and Duchess of Cambridge, was released to celebrate Mother's Day – and what a handsome lad the royal baby is!

The relaxed photograph shows the eight-month-old as a curious, affectionate little boy, gazing into the eyes of the family's pet spaniel, Lupo.

George seems devoted to the cocker spaniel and, judging by the adoration on Lupo's face, the sentiments are returned.

Meanwhile, his parents look happily into the camera's lens. Never before has a Royal portrait depicted such informality.

In the shot, taken by award-winning photographer Jason Bell at a window of the Cambridges' home, Apartment 1A of Kensington Palace, Kate looks radiant in the fresh sunshine of spring.

The last time George was officially pictured, also by Bell, he was asleep in his flowing christening gown last October.

Here, he is a proper little boy with a fluff of brown hair, his mother's dark eyebrows and a very cool jumper!