The newborn baby girl makes her first appearance to the public with the Duke of Cambridge and the Duchess outside St. Mary's Hospital in London, on May 2, 2015.
The newborn baby girl makes her first appearance to the public with the Duke of Cambridge and the Duchess outside St. Mary's Hospital in London, on May 2, 2015.
Two royal fans join in a celebration for the arrival of newborn British princess, on Saturday, May 2, 2015. The Duchess of Cambridge Kate Middleton gave birth to a baby girl on Saturday morning local time.
A fan demonstrate a board featuring royal baby's name in London, on Saturday, May 2, 2015. The Duchess of Cambridge Kate Middleton gave birth to a baby girl on Saturday morning local time.
A fan demonstrates a decorative item in pink, symbolizing the arrival of the newborn British princess in London, on Saturday, May 2, 2015. The Duchess of Cambridge Kate Middleton gave birth to a baby girl on Saturday morning local time.
Fans gather outside St. Mary's Hospital in London, on Saturday, May 2, 2015, to celebrate the arrival of newborn British princess. The Duchess of Cambridge Kate Middleton gave birth to a baby girl on Saturday morning local time.
A town crier announces the birth of the royal baby outside St. Mary's Hospital in London, on May 2, 2015.
A town crier announces the birth of the royal baby outside St. Mary's Hospital in London, on May 2, 2015. Britain's Duchess of Cambridge Kate gave birth to a girl on Saturday morning, adding a new member for the British royal family.
A town crier announces the birth of the royal baby outside St. Mary's Hospital in London, on May 2, 2015. Britain's Duchess of Cambridge Kate gave birth to a girl on Saturday morning, adding a new member for the British royal family.
Journalists gather outside the St. Mary's Hospital in London, on Saturday, May 2, 2015, where the Duchess of Cambridge Kate Middleton gave birth to a baby girl.
Royal fans and journalists gather outside St. Mary's Hospital in London, on May 2, 2015. Britain's Duchess of Cambridge Kate gave birth to a girl on Saturday morning, adding a new member for the British royal family.

The newborn baby girl made her first appearance to the public with the Duke of Cambridge and the Duchess outside St. Mary's Hospital on Saturday evening.

The baby, born at 8:34 a.m. local time (0734 GMT), was presented by her parents to the world at around 6:10 p.m.(1710 GMT).

The Duchess and the Duke of Cambridge looked very relax with smiles on their faces. The Duchess was taking the baby in her arm and the baby girl was asleep.

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The couple didn't say anything in front of the media. But the Duke of Cambridge said he was "very happy" at the arrival of his second child when he went to Kensington Palace earlier this afternoon to take his son to the hospital.

The older brother Prince George has met his sister in the afternoon.

The royal family then left the hospital for Kensington Palace, which just needs a few minutes.

The baby weighs 8 lbs 3 oz, about 3.7 kg.

"Her Royal Highness and her child are both doing well," Kensington Palace said in a statement Saturday morning.

The newborn Princess is now the forth in line to the British throne, behind her brother George, father William and grandfather Prince Charles.

Credit: Xinhua