(VOVworld) - The Duchess of Cambridge gave birth to a girl at St Mary's Hospital, west London on Saturday morning, Kensington Palace has announced.

The world's very first glimpse of the brand new Royal baby. (Photo: Getty Images)

Both Catherine and her daughter are "doing well", Kensington Palace said. The princess weighing 3.7 kg is the fourth in line to the throne.

Prince George, in his father's arms, steals the show on a visit to his little sister. (Photo: Getty Images)

The Duke of Cambridge, who was present for the birth of the baby girl, brought his 21-month-old son Prince George to visit his sister.

The name of the baby hasn’t been announced yet.

British Prime Minister David Cameron has sent the best wishes to the royal couple on Twitter.

To mark the birth of the princess, a 21-gun salute will be fired in many places in London.