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Hello, princess! Kate and William introduce new royal baby to world

Kate and Will introduced their baby girl to the world outside St. Mary's Hospital in London.

The world was introduced to the newest member of the royal family Saturday when Duchess Kate and Prince William left St. Mary's Hospital in London, the same day Kate gave birth to the little princess.

Prince William, Duchess Kate and their newborn baby princess!Matt Dunham / AP

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The royal family with their new daughter
Alastair Grant / AP

The couple didn't say anything, but smiled and waved to the crowd.

The newest heir to the royal throne was born on May 2 at 8:34 a.m. London time, weighing 8 pounds, 3 ounces.

When Prince William brought Prince George to the Lindo Wing to meet his little sister earlier in the day, the pair waved to a roaring crowd.

The Duke And Duchess Of Cambridge Welcome A Daughter
Will and George wave to the crowd!Chris Jackson / Getty Images

Nearly two years ago, Kate and Will exited the same door with their first-born, Prince George.

The Duke And Duchess Of Cambridge Leave The Lindo Wing With Their Newborn Son, Prince George
William and Kate depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England.Scott Heavey / Getty Images file

The new family of four will spend a few days at Kensington Palace in London before returning to their country home.