(RNN) - Kate Middleton, the Duchess of Cambridge, is going into labor with her and Prince William's third child, Kensington Palace tweeted on Monday morning.
The palace said she was in "the early stages of labor."
Middleton is at St. Mary's Hospital in London.
The couple have two children, George and Charlotte. Both were also born at St. Mary's, George in 2013 and Charlotte in 2015.
It is not yet known what the couple plan to name the baby, or what its gender is.
William is second in line to the English throne after his father, Charles.
Her Royal Highness The Duchess of Cambridge was admitted to St. Mary’s Hospital, Paddington, London earlier this morning in the early stages of labour.
The Duchess travelled by car from Kensington Palace to the Lindo Wing at St. Mary’s Hospital with The Duke of Cambridge.
— Kensington Palace (@KensingtonRoyal) April 23, 2018
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