Prince William, set to marry on Friday, was born in the private Lindo Wing of St. Mary's Hospital in London on June 21, 1982, more than a week before his due date.
He was the first male of the British royal family to be born in a hospital. Prince Charles also broke with tradition by attending the birth.
Prince Charles and his first wife, Princess Diana, William's mother, arrived at the hospital very early on the morning of the day William was born.
George Pinker MD, the royal gynecologist, attended Diana. She had also been coached by Betty Parsons, a nurse and natural-birth advocate who had helped Queen Elizabeth with a couple of her births.
Many accounts present the birth as "natural" and drug-free, while at least one insider book holds that the princess had an epidural during her 16-hour labor.
William was born at 9:03 p.m., and weighed 7 lb. 2 oz. A 41-gun salute was fired off in his honor. Princess Diana was back home the next day.
Prince Charles, always restrained, was clearly thrilled. He wrote friends, "I can't tell you how excited and proud I am," adding that he found the newborn William "surprisingly appetising."