The Duke and Duchess of Cambridge welcomed their first child on Monday.
The Associated Press reports the baby boy was born at 4:24 p.m., and weighs 8 pounds, 6 ounces.
The boy will be the third in line for the throne, behind his grandfather and father.
A name has not yet been announced for the child yet.
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UPDATED: 7/22/13, 4:41 p.m.:
Royal Crier Tony Appleton read the royal proclamation announcing the birth of Prince William and the Duchess of Cambridge's son on the steps of St. Mary's hospital in London Monday.