Britain's Catherine, Duchess of Cambridge holds her newly-born daughter, her second child with Britain's Prince William, Duke of Cambridge, as they show her to the media outside the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. (BEN STANSALL,BEN STANSALL/AFP/Getty Images)
Kate & William's Baby Girl!
Britain's Prince William, Duke of Cambridge, carries his newly-born daughter, his second child with Catherine, Duchess of Cambridge, as they leave the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. The Duchess of Cambridge was safely delivered of a daughter weighing 8lbs 3oz, Kensington Palace announced. The newly-born Princess of Cambridge is fourth in line to the British throne. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)
Kate & William's Baby Girl!
Britain's Prince William, Duke of Cambridge, and his wife Catherine, Duchess of Cambridge show their newly-born daughter, their second child, to the media outside the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. The Duchess of Cambridge was safely delivered of a daughter weighing 8lbs 3oz, Kensington Palace announced. The newly-born Princess of Cambridge is fourth in line to the British throne. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
Kate & William's Baby Girl!
Kate & William's Baby Girl!
Britain's Prince William, Duke of Cambridge, and his wife Catherine, Duchess of Cambridge show their newly-born daughter, their second child, to the media outside the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. The Duchess of Cambridge was safely delivered of a daughter weighing 8lbs 3oz, Kensington Palace announced. The newly-born Princess of Cambridge is fourth in line to the British throne. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge leave The Lindo Wing of St Mary's Hospital with their newborn daughter on May 2, 2015 in London, England. (Photo by Ian Gavan/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge leave The Lindo Wing of St Mary's Hospital with their newborn daughter on May 2, 2015 in London, England. (Photo by Ian Gavan/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England. (Photo by Chris Jackson/Getty Images)
Kate & William's Baby Girl!
Britain's Prince William, Duke of Cambridge, carries his newly-born daughter, his second child with Catherine, Duchess of Cambridge, as they leave the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. ( BEN STANSALL/AFP/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England. (Photo by John Stillwell - WPA Pool/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England. (Photo by John Stillwell - WPA Pool/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England. (Photo by John Stillwell - WPA Pool/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge departs the Lindo Wing with her newborn daughter at St Mary's Hospital on May 2, 2015 in London, England. (Photo by Chris Jackson/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England. (Photo by John Stillwell - WPA Pool/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England.(Photo by John Stillwell - WPA Pool/Getty Images)
Kate & William's Baby Girl!
Britain's Prince William, Duke of Cambridge, carries his newly-born daughter, his second child with Catherine, Duchess of Cambridge, as they leave the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. (LEON NEAL/AFP/Getty Images)
Kate & William's Baby Girl!
Britain's Prince William, Duke of Cambridge, carries his newly-born daughter, his second child with Catherine, Duchess of Cambridge, as they leave the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. (JOHN STILLWELL/AFP/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England. The Duchess was safely delivered of a daughter at 8:34am this morning, weighing 8lbs 3 oz who will be fourth in line to the throne. (Photo by Chris Jackson/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England. (Photo by Chris Jackson/Getty Images)
Kate & William's Baby Girl!
Britain's Catherine, Duchess of Cambridge holds her newly-born daughter, her second child with Britain's Prince William, Duke of Cambridge, as they show her to the media outside the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. ( JOHN STILLWELL/AFP/Getty Images)
Kate & William's Baby Girl!
Britain's Prince William, Duke of Cambridge, and his wife Catherine, Duchess of Cambridge show their newly-born daughter, their second child, to the media outside the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. (LEON NEAL/AFP/Getty Images)
Kate & William's Baby Girl!
Britain's Prince William, Duke of Cambridge, carries his newly-born daughter, his second child with Catherine, Duchess of Cambridge, as they leave the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. ( JOHN STILLWELL/AFP/Getty Images)
Kate & William's Baby Girl!
Britain's Prince William, Duke of Cambridge, carries his newly-born daughter, his second child with Catherine, Duchess of Cambridge, as they leave the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. (JOHN STILLWELL/AFP/Getty Images)
Kate & William's Baby Girl!
Britain's Catherine, Duchess of Cambridge holds her newly-born daughter, her second child with Britain's Prince William, Duke of Cambridge, as they show her to the media outside the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. (JOHN STILLWELL/AFP/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England. (Photo by Chris Jackson/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England.(Photo by Chris Jackson/Getty Images)
Kate & William's Baby Girl!
Britain's Prince William, Duke of Cambridge, (R) and his wife Catherine, Duchess of Cambridge show their newly-born daughter, their second child, to the media outside the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. (LEON NEAL/AFP/Getty Images)
Kate & William's Baby Girl!
Britain's Prince William (R) and Catherine, Duchess of Cambridge show their newly-born daughter, their second child, to the media outside the Lindo Wing at St Mary's Hospital in central London, on May 2, 2015. (LEON NEAL/AFP/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England. (Photo by Chris Jackson/Getty Images)
Kate & William's Baby Girl!
Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015 in London, England.(Photo by Chris Jackson/Getty Images)