New Parents Kate & Will: A Relationship in Pics

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.

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.

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

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

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.

William and Kate posing for their official Royal Wedding portrait on April 29, 2011.

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

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.

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

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

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

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

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.

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.

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

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