Her next public appearance was her outing at Trooping The Colour on Saturday, where she joined the royal family on the balcony for the flypast.
Along with Princess Charlotte, the Duchess of Cambridge and other members of the family, the children played outside while the Duke of Cambridge took part in the Maserati Royal Charity Polo Trophy match.
The last time we saw George and Savannah together, they were stealing the show at Trooping the Colour over the weekend.
Prince George pictured playing with a toy gun and people aren't happy
However, images of young George wielding a toy gun (and a toy knife) spoiled the mood online. She teamed the look with a pair of Russel and Bromley wedges, which she was spotted expertly running in later in the day.
Four-year-old Prince George was photographed playing with a toy gun at a polo match on Sunday, sending social media into a frenzy over whether or not children should be able to have fake weapons. The 3-year-old sported a pink patterned dress with oversized sunglasses and navy sneakers as she supported her father and practiced her gymnastics skills.
"Kate alone shouldn't be blamed about this as we don't know who owns the toys, but someone should have said that this is NOT OK".More news: Wonder Woman 1984 First Look: Steve Trevor Is Alive?!
Savannah, 7, first pretended she was conducting music as the national anthem played and then put her hand over the mouth of George, who appeared to be singing along, as if to quiet him.
But don't think Charlotte was alone in all of the shenanigans.
She was also seen relaxing in Kate's lap and climbing up a bank with her mother.More news: WH adviser Navarro apologizes for 'special place in hell' slam at Trudeau
Princess Charlotte had a great fall but Kate Middleton saved the day.
At one point, mischievous Charlotte made Kate and Autumn Phillips collapse into fits of giggles as she performed an impressive headstand, while a shy George watched on.More news: Amazon halts new construction; Seattle backs down on business tax