Royal fans watched as the Queen gathered her family for a service of thanksgiving to honour her late husband Prince Philip on Tuesday.
LOOK: Kate Middleton's My Fair Lady hat has us in awe at Prince Philip's service
The moving event was held in Westminster Abbey and saw the monarch travel from her home in Windsor, accompanied in her car by Prince Andrew. It was a rare occasion to see so many of the royal family come together, particularly after over two years of Covid-19 restrictions. One moment in particular that has delighted royal fans, is a sweet moment shared between Princess Beatrice and Princess Charlotte.
WATCH: Princess Charlotte shares sweetest moment with Princess Beatrice
In footage broadcast by the BBC, six-year-old Princess Charlotte can be seen looking back at Princess Beatrice from the pews.
Catching the eye of her cousin Prince William's daughter, Beatrice shared a heartwarming smile with the royal tot, who returned the gesture with an excited grin before returning to her hymn sheet.
LOOK: Princess Charlotte channels Kate Middleton in cutest £50 dress
SEE: Prince George and Princess Charlotte make surprise appearance at Prince Philip's memorial service
Princess Charlotte arrived at the service with the Duchess of Cambridge
Royal fans were quick to spot the charming exchange on Twitter, rushing to share their thoughts on the adorable family moment. "Aw I have a feeling they have always had a lovely relationship! A pic from Eugenie’s wedding comes to mind," wrote one fan.
"They seem to have a special bond since always!" shared another, as a third fan commented: "Such a sweet moment between Princess Charlotte and Princess Beatrice, just look at them!" adding a heart-eye emoji.
MORE: Princess Beatrice looks regal and radiant in fitted coat dress at Prince Philip's service
Others wondered if the secret moment shared between the princesses was due to their close bond, which may have grown stronger since Beatrice welcomed her daughter Sienna with husband Edoardo Mapelli Mozzi in September last year.
"How did [Beatrice] sense Charlotte was looking at her? Charlotte might have played with Sienna!" a royal fan remarked on Twitter.
Princess Beatrice pictured next to a young Princess Charlotte at her sister's wedding
As a new mother herself, Beatrice is clearly great with children.
Baby Sienna is the second grandchild for the Duke of York and Sarah, Duchess of York, and the 12th great-grandchild for the Queen.
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