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Cameras captured asweet moment between Meghan Markle, Peter Phillips' daughters, and Zara Tindall’s children.

Kate Middleton’s coordinated look with Meghanwas equally as memorable.

The Cambridge kids waving during the Trooping the Colour event

However, the Duke and Duchess of Cambridge’s kids completely stole the show.

The royal expert isn’t the first to make this comparison.

The royal expert recalled the affection between Princess Charlotte and Prince Louis.

The Cambridge kids posing on the Buckingham Palace balcony

The unexpected but kind gesture has come around full circle.

PerHarper’s Bazaar, in 2018, Buckingham Palace released official portraits from Prince Louis' christening.

In the photo, Princess Charlotte lovingly watches over her little brother while holding his hand.

The Cambridge kids waving during the Trooping the Colour event

As the Platinum Jubilee celebrations continue, there’s bound to be more heartfelt moments between the royal siblings.