It was Prince Louis' (1)  first time at the annual 'Trooping the Colour'. The youngest of the Cambridge children was seen for the first time at the event and he looked amazingly cute in the arms of his parents Prince William (36) and Duchess Kate (37).

The little prince watched the events with excitement and eventually started to wave wildly. It was so sweet to see how Big Louis already is. He is starting to look a lot like his big brother Prince George (5).

Trooping the Colour: Prince George and his siblings were very well behaved

Prince Louis' siblings Princess Charlotte (4) and Prince George were also on their best behavior. They waved to the crowds and proved that they already are being well prepared for the tasks ahead of them once they are of age.

Prince William's cute children have a new playmate, ever since Duchess Meghan (37) gave birth to her first child: little Archie Harrison. Duchess Meghan also attended Trooping the Colour - her first appearance since giving birth.