Duchess of Cambridge gives birth to baby girl

Britain's Prince William and Kate, Duchess of Cambridge and their newborn baby princess leave St. Mary's Hospital's exclusive Lindo Wing, London, Saturday, May 2, 2015. (AP Photo/Alastair Grant)

Prince William and Kate, the Duchess of Cambridge, have emerged from a London hospital with their newborn baby girl.

The Duchess of Cambridge safely delivered the baby, weighing 8 lbs 3 oz., early Saturday at St. Mary's Hospital.

PHOTOS: Duchess of Cambridge gives birth to baby princess!

Britain's newest royal is fourth in line to the throne and the fifth great-grandchild of Queen Elizabeth II, 89.

Crowds of well-wishers outside the hospital cheered as the couple stepped out briefly, posing and waving for photographers.

VIDEO: Prince William, Kate Middleton introduce newborn princess to the world

Kate, who wed William in April 2011, gave birth to their first child, Prince George, at the same hospital in July 2013.
PHOTOS: Kate, Duchess of Cambridge, throughout her pregnancy

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