Fresh from their appearance at Trooping the Colour, the Duchess of Cambridge and her two eldest children, Prince George and Princess Charlotte, headed to the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club on Sunday to cheer on dad Prince William, who was taking part.
The trio were accompanied by Autumn Phillips and her two daughters, Savannah and Isla Phillips, who, judging by the fun pictures from their balcony appearance on Saturday and the amusing snaps from Sunday, seem to have a great relationship with William and Kate's children.
MORE: All the pictures from Trooping the Colour
George and Charlotte spent the sunny afternoon running around the field, playing with a slinky and even drawing colourful paintings... see all the pictures from their fun day out.
Princess Charlotte kicked off her shoes and chased her brother around the field. The couple seem to have a very sweet relationship together.
At one point in the day George sat with some other friends and played 'cowboys' with toy guns.
Princess Charlotte looked fashionable in a pink summer dress which she simply accessorised with a pair of white sunglasses!
Prince George and Princess Charlotte played with a lot of toys, including a slinky. In this picture, mum Kate can be seen showing her eldest son exactly how it works.
Princess Charlotte proved herself to be quite the acrobat, doing forward rolls and prancing and skipping around the grass.
Kate looked stunning in a casual blue striped midi dress by high street favourite Zara. The dress is still available for just £39.99.
The mother-of-three accessorised her gorgeous dress with a pair of practical Russell and Bromley wedges.
Mum Kate made sure that her only daughter, Princess Charlotte, was tended to. Both girls looked gorgeous in the summer dresses.
No time for relaxing! Kate, who loves sport, also ran around the field and had fun with all the kids.
The family sat together to cheer on Prince William. Sunday's charity match raised funds and awareness for two charities – the Royal Marsden, which the Duke supports as president, and Centrepoint, of which he is patron.
Prince George was carrying around a picture that he seemed to have done himself - if so it looks like he has inherited his mother's artistic flair.
Duchess Kate's figure has bounced back very swiftly after the birth of her third child, Prince Louis, in late April. She looked pretty and relaxed in her casual summer dress.
Duchess Kate has said previously she likes nothing more than having time to spend with her children outdoors. She seemed to be enjoying every minute of her fun afternoon in the sun.