Kate Middleton stepped out for the royal family's annual Christmas day walk on December 25, arriving to church in Sandringham ...

Specifically, her hat is what gave it away. Yesterday Kate Middleton stepped out for the royal family's annual walkabout for ...

On Dec. 25, the Princess of Wales, 42, and the Queen, 77, both wore deep green coats with coordinating hats for a ... PA Images via Getty Kate Middleton Steps Out for Christmas Day Walk Alongside ...

The Princess of Wales was all smiles as she joined the rest of the royal family for Christmas Day church services.

Kate Middleton and Prince William attended Christmas Day church services with ... a stunning green coat paired with a matching pillbox hat and a coordinating blue and green tartan scarf.

Since she became the Princess of Wales, Kate Middleton has worn playful pantsuits and a plethora of polka dots.

Kate Middleton and Queen Camilla must have known how much royal fans loved the fact that the Princess of Wales and Princess ...

The Princess of Wales was joined by Prince William and their children at the Church of St Mary Magdalene on the Sandringham ...

George, 11, Charlotte, 9, and Louis, 6, walked alongside their parents Prince William and Kate, the Princess of Wales, as members of Britain's royal family made their way into St. Mary Magdalene ...

Kate Middleton stepped out for the royal family’s annual Christmas day walk on December ... but because of her hat, which was a small green beret/fascinator,” Judi explained.

While Middleton's outfit ... but because of her hat, which was a small green beret/fascinator," James explained while speaking with Cosmopolitan. She added, “Kate arrived at church walking ...

Yesterday Kate Middleton stepped out for the royal family's annual walkabout for Christmas Day church service ... and a green hat that expertly matched her jacket and featured a festive bow ...