The Duke and Duchess of Cambridge Make First Public Appearance after the Birth of Their Son

CLEAN: External soundbite Prince William speaking to press while standing with his wife Catherine, Duchess of Cambridge and holding their newborn son, saying 'He's got a good pair of lungs on him, he's a big boy, he's quite heavy...we're still working on a name...it's the first time we've seen him really so this is our first chance to catch up'. The Duke and Duchess of Cambridge Make First Public Appearance after the Birth of Their Son on July 23, 2013 in London, England (Footage by Sky News/Getty Images)