It's a boy for Prince William and Duchess Catherine, Kensington Palace announced Monday afternoon.
Catherine gave birth today at St. Mary's Hospital in West London. The baby is third in line for the British throne.
Kate Middleton went into labor this morning. A Notice of Birth will be placed outside the doors of Buckingham Palace.
Royal historian Anna Whitelock tells London's Sky News the birth notice on an easel is a theatrical tradition of the palace. There, the world will finally find out some of the details about the infant like gender, time of birth and weight.
Royal historian Anna Whitelock says the birth notice on an easel outside Buckingham Palace is a theatrical tradition of the palace.