Princess Charlotte had a big day yesterday as she was among the youngest guests at Prince Philip's memorial service.
Her appearance at the event was her first outing at a public royal church service alongside her older brother Prince George.
The pair were accompanied to the ceremony by their parents the Duke and Duchess of Cambridge - and they were seen shaking hands with officials and joining in with the hymns.
And TV cameras caught Charlotte in one particularly adorable moment midway through the ceremony.
The event took place at Westminster Abbey and TV screen were dotted around the building to ensure everyone attending could watch proceedings.
While gazing around the enormous landmark, cameras picked up Charlotte noticing herself on the TV screens as she sat alongside mum Kate.
Footage shows the young princess jumping up in her seat after spotting herself and pulling a wry smile.
The moment was spotted by royal fan Twitter account @RoyalReporterUK - and others couldn't help but comment on her sweet response.
One wrote: "Princess Charlotte is so cute!"
While another said: "Oh that's just adorable."
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Meanwhile one added: "You can't help but smile when you see this."
However, it wasn't Charlotte's only blink and you'll miss it adorable moment at yesterday's service.
The Cambridge family sat near the front of the Abbey in a row in front of Prince William's cousins Princess Beatrice and Princess Eugenie, who were accompanied by their husbands Edoardo Mapelli Mozzi and Jack Brooksbank.
And an adorable moment was spotted between Charlotte and Beatrice as the congregation sang a hymn.
Footage shows that as Charlotte gazed around the huge building as the congregation sang, the young princess caught the eye of Beatrice behind her.
As the pair locked eyes, Beatrice gave an exaggerated smile to Charlotte, who in return gave a wide smile back to her dad's cousin.
The young royals were led at the service by the Queen to pay a final tribute to her beloved husband Prince Philip, despite concerns she wouldn't be able to attend for health reasons.
Dressed in a dark green coat, the Queen used a walking stick as she took her seat in the front row of the packed abbey, next to Prince Charles and Camilla.
The Queen only made the final decision to attend that morning and special arrangements were put in place for her comfort.
