Gallery: It’s a girl!

Britain's Prince William and his fiancee Kate Middleton (L) pose for a photograph in St. James's Palace, central London November 16, 2010. Photo: Suzanne Plunkett/Reuters

Catherine, Duchess of Cambridge smiles as she leaves the Stephen Lawrence Centre in south east London. Photo: Stefan Wermuth/Reuters

Britain's Kate, the Duchess of Cambridge, left, stands with Prince William, as they attend the annual Commonwealth Observance at Westminster Abbey, in London, Monday, March 9, 2015. The Duchess of Cambridge is pregnant and is expected to give birth in April. (AP Photo/John Stillwell, Pool)

Members of the media set up outside the entrance to the Lindo wing of St Mary's Hospital in central London. Photo: Suzanne Plunkett/Reuters

Royal fan Terry Hutt enjoys a hot drink as he celebrates his 80th birthday outside the Lindo Wing of St Mary's Hospital, as he continues his vigil waiting for Kate, Duchess of Cambridge to arrive at the hospital, in London. Photo: Alastair Grant/AP

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. Photo: Cathal McNaughton/Reuters

A ceremonial town crier holds a scroll after announcing 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. Photo: Cathal McNaughton/Reuters

Betting odds are written on a chalkboard outside the Lindo Wing at St. Mary's Hospital in anticipation of Kate, Duchess Cambridge giving birth to her second child, London. Photo: Tim Ireland/AP

A board with gambling odds on the baby's name is placed outside the Lindo Wing of St. Mary's in London. Photo: ANDREW COWIE/EPA

Policemen stand guard outside the Lindo Wing of St. Mary's in London. Photo: ANDREW COWIE/EPA

Royal supporter John Loughrey, centre, salutes as he stands with men dressed as soldiers carrying boards with proposed baby names on, outside the Lindo Wing of St Mary's Hospital in London, Friday, May 1, 2015. Kate, The Duchess of Cambridge is due to give birth at the hospital in the next few days. (AP Photo/Kirsty Wigglesworth)

Britain's United Kingdom Independence Party (UKIP) leader Nigel Farage celebrates the birth of the Royal baby at a public house in Ramsgate, Kent, during a day of campaigning for the the upcoming general election on Saturday May 2, 2015. Britain goes to the polls on May 7. Kate, the Duchess of Cambridge, gave birth to a baby girl, royal officials said Saturday. (Gareth Fuller/PA via AP) UNITED KINGDOM OUT, NO SALES, NO ARCHIVE,

Royal fans and well wishers react after Kensington Palace announced that Kate, the Duchess of Cambridge, had given birth to a girl, outside the Lindo Wing of St. Mary's Hospital, London, Saturday, May 2, 2015. Kensington Palace said in a brief statement that Prince William's wife "was safely delivered of a daughter" at 8:34 a.m. London time (0734 GMT), less than three hours after she was admitted to central London's St. Mary's Hospital. (Daniel Leal-Olivas/PA via AP) UNITED KINGDOM OUT, NO SALES, NO ARCHIVE

Britain's Prince William and Kate, Duchess of Cambridge, hold their baby princess, as they as they pose for the media outside St. Mary's Hospital's exclusive Lindo Wing, London, Saturday, May 2, 2015. Kate, the Duchess of Cambridge, gave birth to a baby girl on Saturday morning. (AP Photo/)

Short, square and neatly finished with a classic French manicure, the Duchess's nails were immaculate as she posed for the media on the steps of The Lindo Wing of St Mary's Hospital, London. Picture: John Stillwell/Pool via AP

The baby daughter of Britain's Prince William and Catherine, Duchess of Cambridge, sleeps as she is carried in a car seat from the Lindo Wing of St Mary's Hospital, in London. Picture: John Stillwell/Reuters