Prince William (1st R) and his wife Catherine (2nd R), Duchess of Cambridge, meet the public with their baby in Kate's arms outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Yin Gang)

Prince William and his wife Catherine, Duchess of Cambridge, meet the public with their baby outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Yin Gang)

Prince William and his wife Catherine, Duchess of Cambridge, meet the public with their baby outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Yin Gang)

Catherine, Duchess of Cambridge, passes their baby to Prince William outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Yin Gang)

Prince William and his wife Catherine, Duchess of Cambridge, meet the public with their baby outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Yin Gang)

Prince William and his wife Catherine, Duchess of Cambridge, meet the public with their baby outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Yin Gang)

Prince William and his wife Catherine, Duchess of Cambridge, meet the public with their baby outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Yin Gang)

Prince William and his wife Catherine, Duchess of Cambridge, meet the public with their baby outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Bimal Gautam) Prince William and his wife Catherine, Duchess of Cambridge, meet the public with their baby outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Yin Gang) Prince William and his wife Catherine, Duchess of Cambridge, meet the public with their baby outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Yin Gang) Prince William and his wife Catherine, Duchess of Cambridge, meet the public with their baby outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Bimal Gautam) Prince William and his wife Catherine, Duchess of Cambridge, meet the public with their baby outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Bimal Gautam) Catherine, Duchess of Cambridge, passes their baby to Prince William outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Yin Gang)

Catherine, Duchess of Cambridge, meets the public with her baby outside the Lindo Wing of St Mary's Hospital, in central London, July 23, 2013. Britain's Duchess of Cambridge Kate gave birth to a boy Monday afternoon. (Xinhua/Yin Gang)