By Adam Coppola
12:35 PM PDT, July 22, 2013
With the arrival of the royal baby -- a boy! -- on Monday, July 22, 2013, let's take a look back at some memorable moments over the years from Prince William and Kate Middleton's relationship.
1 / 16
And a Baby Makes Three

Getty Images
With the arrival of the royal baby -- a boy! -- on Monday, July 22, 2013, let's take a look back at some memorable moments over the years from Prince William and Kate Middleton's relationship.

Getty Images
Kate Middleton and Prince William on their graduation day at St. Andrew's University in 2005. The pair first met at Scotland's prestigious school in 2001.

Getty Images
In 2007, cheering on the English rugby team with Prince Harry at a tournament in London.

Getty Images
Posing for cameras after happily announcing their engagement on November 16, 2010, following an eight year romance.

Getty Images
Kissing on the balcony of Buckingham Palace after tying the knot on April 29, 2011. The Royal Wedding was viewed by billions of people worldwide.

Copyright St James’s Palace 2011, by photographer Hugo Burnand
William and Kate posing for their official Royal Wedding portrait on April 29, 2011.

Getty Images
All smiles while watching a rodeo demonstration during their visit to Calgary, Canada on July 7, 2011.

Getty Images
The newlyweds attending a polo match in Santa Barbara, California on July 9, 2011 during the first day of their overseas tour to the U.S.

Getty Images
William and Kate as they help pack care packages for military children during their trip to Los Angeles, California on July 10, 2011.

Getty Images
In London, waving to fans at the second Diamond Jubilee celebration for Queen Elizabeth II on June 3, 2012.

Getty Images
William and Kate enjoying a children's sports event in England on June 13, 2012.

Getty Images
Embracing during a cycling race at the London 2012 Olympic Games on August 2, 2012.

Getty Images
Seen here leaving a hospital on December 6, 2012, after Kate was treated for acute morning sickness just three days after her pregnancy was announced.

Getty Images
Prince Harry, Prince William, and Kate Middleton enjoying a tour of the Harry Potter set at Warner Bros. Studios in Hertfordshire, England on April 26, 2013.

Getty Images
Kate showing more of a baby bump as she and Prince William attend service at Westminster Abbey on June 4, 2013.

Getty Images
Kate's last public engagement before giving birth, attending a royal ceremony for Queen Elizabeth II on June 15, 2013.