Kensington Palace has confirmed that Kate Middleton was admitted to the Lindo Wing of St. Mary's Hospital in Paddington early on Saturday.
The attending doctor is surgeon-gynecologist Guy Thorpe-Beeston. Queen Elizabeth's surgeon-gynecologist, Alan Farthing, will assist in the birth of the queen's fifth great-grandchild and the fourth in line to the throne. Both doctors were present at the birth of Prince George in July 2013.
According to The Guardian, the palace said "labour is progressing as normal."
After the queen and other close family have been informed, the baby's time of birth, sex and weight will be Tweeted before the formal easel is placed outside Buckingham Palace.
If the baby is a girl, she will be the first princess in 25 years born to the British royal family, according to The Guardian. She will be the highest female in line of succession since Princess Anne was born 65 years ago. The last Princess of Cambridge was born 182 years ago - George III's granddaughter, Princess Mary Adelaide of Cambridge. Princess Mary Adelaide was born in Hanover, Germany, in 1833.
