Catherine, Duchess of Cambridge, Prince William Catherine, Duchess of Cambridge, Prince William

Meet the royal baby!

Prince William and Kate Middleton left St. Mary's Hospital in LondonTuesday evening with the newest addition to their family.

Wearing coordinating baby blue outfits, the new parents each posed with their son and were greeted by cheers from well-wishers who had waited outside the hospital in anticipation. The happy family took a moment to wave to the crowd and share details on their bundle of joy. "He's got way more hair than me, thank God," Will joked.

Poll: What should Will and Kate name his Royal Highness?