Sweet detail on Princess Charlotte's backpack you might of missed

Princess Charlotte is finally off to school!

The royal tot joined big brother Prince George on Thursday morning for her first day of school at Thomas's Battersea in London. Escorted by Duchess Kate and Prince William, the family could not have looked happier at the early morning drop off.

While Charlotte and George dressed in the school's traditional navy blue and red uniforms, Charlotte has already found a clever way to show off her bubbly personality: on her backpack!

As mom Kate carried her backpack to school, royal fans were quick to notice a pink sequined unicorn keychain hanging off of Charlotte's backpack!

People spotted that this was not the first time that the 4-year-old had shared her love of the mythical creature. Back in July at Prince William and Prince Harry's polo match, Charlotte ran around carrying a unicorn wristlet from TY (shop it here).

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