Kate Middleton arrived at the hospital to welcome her third child with husband Prince William, the palace confirms Monday.
“Her Royal Highness The Duchess of Cambridge was admitted to St. Mary’s Hospital, Paddington, London earlier this morning in the early stages of labor,” the statement reads.
“The Duchess travelled by car from Kensington Palace to the Lindo Wing at St. Mary’s Hospital with The Duke of Cambridge.”
The royal mom was admitted to the Lindo Wing at St. Mary’s Hospital in London, the same hospital where she gave birth to Prince George and Princess Charlotte.
The new royal baby will be the fifth in line of succession after Prince Charles, William, George and Charlotte. Prince Harry — currently fifth in line to the throne — will be bumped to sixth in line.
The soon-to-be mother of three first announced her pregnancy in September in a statement from the palace.
“Their Royal Highnesses The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting their third child,” the statement read. “The Queen and members of both families are delighted with the news.”
Prince William and Kate Middleton
Just like her previous pregnancies, Kate suffered from Hyperemesis Gravidarum during her first trimester, which led her to miss Prince George’s first day of school. But she resumed her royal duties by her second trimester, keeping up a busy schedule until the weeks leading up to the birth. At an event in February, Kate joked that William was “in denial” ahead of the arrival of their third child.
Kate gave birth to daughter Charlotte in May 2015 only two-and-a-half hours after being admitted to the hospital. And just 10 hours after she gave birth, she appeared on the hospital steps looking stunning as she introduced the baby princess to the world.
The arrival of Will and Kate’s third child could be historic: If the baby is a boy, he will not displace big sister Charlotte in the line of succession, thanks to a measure that passed just after Will and Kate’s 2011 wedding. Up until this change, a younger son would usurp his older sister’s place when it comes to inheriting the throne.
This article originally appeared on PEOPLE.