Prince William and Kate Middleton are showing off their new prince.  The royal couple and their baby were greeted with thunderous cheers by onlookers outside St. Mary's Hospital in London, where the Duchess of Cambridge gave birth yesterday several hours after being admitted.  The proud father and radiant mother waved and smiled to the crowd. 

The Royals Welcome A Boy 

The royal couple say they're still considering names for their bouncing baby boy.  In their first appearance with the young prince outside the London Hospital, Prince William remarked that his son has a "good pair of lungs." 

Duchess Catherine appeared, looking gorgeous, in a light blue dress with white polka-dots cradling her son in a white blanket. 

Check out the first photo here! 

Photo Credit Getty Images