A ceremonial town crier announces the birth of a baby girl to royal fans and members of the media outside the entrance to the Lindo wing of St Mary's Hospital in London, Britain May 2, 2015. [Photo/Agencies]

LONDON - Britain's Duchess of Cambridge, the wife of Prince William, has given birth to a daughter, the couple's residence Kensington Palace announced on Saturday.

The baby, their second child, weighed 8 lbs 3 oz and William was present at the birth, it said in a Twitter statement.

The announcement was greeted by cheers outside the hospital, where die-hard royal fans dressed in patriotic Union Jack gear have been camping out on the sidewalk, eagerly awaiting news. A town crier in elaborate costume loudly declared the news at the hospital's door, clanging his bell to welcome the new royal.

The new baby will be fourth-in-line to the throne, behind brother George, father William and grandfather Prince Charles.

"Her Royal Highness and her child are both doing well," the palace added.