Prince George Celebrates the Birth of His Sister in an All-Blue Outfit

Now that he's officially a big brother, Prince George stepped out with his dad, Prince William, to meet his brand-new baby sister at St. Mary's Hospital in London. Decked out in an all-blue ensemble, which included a navy top, light blue shorts, and a pair of matching knee socks, George looked like the spitting image of his dad as they entered the Lindo Wing, where Kate and the little one were staying — in fact, they even matched! But while William and his son favored blue, Kate and the princess — whose official title is Her Royal Highness, Princess of Cambridge — went with white: Kate in a floral dress by Jenny Packham, her daughter bundled up in a knit hat and blanket. Read on to see the boys' looks ahead, then see what the girls wore as they made their way home.

Getty

The boys of the royal family waved to photographers while wearing all-blue outfits.

Getty

How cute was Prince George in his little shorts and sweater?! And those knee-high socks . . .

Getty

If the boys wore blue, we assumed Kate would be wearing pink, as it was a color she favored during her pregnancy. But the duchess surprised us: she went with a white and yellow Jenny Packham dress instead.

Getty

There they go! Off to see the new baby!

Getty

William had stepped out earlier to pick up George and bring him back to the hospital. He was already wearing his blue shirt and navy pants.

Getty

He definitely looked like a proud dad — and a stylish one, too!