Prince William, Kate Middleton
Prince William and Kate Middleton leaving the King Edward VII hospital in central London in 2012, where she was treated for acute morning sickness early on in her pregnancy. The royal couple is expected to leave St. Mary's Hospital in London Tuesday and reveal their first-born son for the first time. Reuters

Just hours after the birth of their healthy baby boy on Monday, the Duke and Duchess of Cambridge, Kate Middleton and Prince William, are expected to show off the royal bundle of joy and the future king of England in front of St. Mary’s Hospital later Tuesday.

Buckingham Palace announced that the royal couple, both 31, are now the parents of a boy, born at 4:24 p.m. The royal heir, who's third in line to the throne, weighed 8 pounds, 6 ounces, and was delivered at the Lindo Wing of St. Mary’s Hospital in London, where the late Princess Diana gave birth to Prince William in 1982 and Prince Harry in 1984.

“Her Royal Highness The Duchess of Cambridge was safely delivered of a son at 4:24 p.m.," the Palace said in a statement. "The baby weighs 8lbs. 6oz. The Duke of Cambridge was present for the birth. The Queen, The Duke of Edinburgh, The Prince of Wales, The Duchess of Cornwall, Prince Harry & families have been told and are delighted. Her Royal Highness and her child are both doing well and will remain in hospital overnight."

The Duke and Duchess of Cambridge are expected to leave the facility on Tuesday, according to multiple reports. It's not known if the couple will announce the name of the royal child upon leaving the facility. The royal family has an uneven history regarding when they announce the names of the royal children. Queen Elizabeth waited one month before revealing the name of her son, Prince Charles, who followed in his mother’s footsteps by waiting one week before announcing the name of his first-born, Prince William. The Prince and Duke of Cornwall, however, announced the name of Prince Harry, currently fourth in line to the throne, immediately after his birth.

While the name of the child is currently unknown, the Palace said earlier this month in a statement that the child's title will be "His Royal Highness Prince of Cambridge." Queen Elizabeth was reportedly the one to assign the newborn the official moniker.

Watch the St. Mary’s Hospital live stream here to get a first glimpse of the royal baby boy: