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 / Updated  / Source: TODAY
By Rebekah Lowin

It's been four years since Kate Middleton (now Catherine, the Duchess of Cambridge) and Prince William tied the knot!

And, seeing as the Royal Baby No. 2 is now a few days overdue, the happy couple just might find themselves celebrating two momentous occasions today, rather than one.

But let's not get too carried away. We'll continue to wait patiently and follow the duchess' lead. After all, she hasn't let the waiting game stop her from performing her normal duties this week, from picking up Prince George (now 21 months old) from swimming practice at Buckingham Palace to thoughtfully sending a breakfast package to the royal super fans currently camped out outside the Lindo Wing of St. Mary's Hospital in London.

And while we're twiddling our thumbs in anticipation of a new royal, we may as well celebrate the royal duo we do know a thing or two about.

See below for TODAY's picks of the 26 most romantic photos of Will and Kate, and stay tuned to TODAY.com for more royal baby news and reports!

1.

Image: The Duke And Duchess Of Cambridge Tour Southeast Asia - Day 3
Cheers! Kate and Will share a toast in Singapore on September 13, 2012.Pool / Getty Images

2.

Image: Olympics Day 6 - Cycling - Track
The couple shares a happy moment during the London 2012 Olympic Games.Pascal Le Segretain / Getty Images

3.

Image: The Duke And Duchess Of Cambridge North American Royal Visit - Day 6
How cute is this? The pair tries on red jackets as they visit the Canadian Rangers station in 2011.Samir Hussein / WireImage

4.

Image: 2012 Olympic Games - Opening Ceremony
Kate and Will enjoy the Opening Ceremony of the London 2012 Olympic Games.Pascal Le Segretain / Getty Images

5.

Image: The Duke And Duchess Of Cambridge Canadian Tour - Day 9
Howdy, partner! The royals attend the Calgary Stampede on July 8, 2011.Chris Jackson / Getty Images

6.

Image: Britain's Prince William and Catherine, Duchess of Cambridge, walk together in Buckingham Palace in central London
Kate and Will take a sweet walk in Buckingham Palace following their wedding on April 30, 2011.John Stillwell / Pool via Reuters

7.

Image: The Duke And Duchess Of Cambridge North American Royal Visit - Day 5
Hug it out! The two embrace after taking part in a dragon boat race in 2011.Samir Hussein / WireImage

8.

Image: The Duke And Duchess Of Cambridge Meet Middle Temple Scholars
Kate and Will laugh as they sign the visitors book during a visit to Middle Temple in 2012.Chris Jackson / Getty Images

9.

Image: The Duke and Duchess of Cambridge Attend BAFTA Inner City Arts Event
The couple has fun making hand prints in clay on July 10, 2011 in Los Angeles.Pool / Getty Images

10.

Image: The Duke And Duchess Of Cambridge Tour Australia And New Zealand - Day 7
Kate and Will share a sweet look while watching 'Rippa Rugby' in New Zealand.) / Getty Images

11.

Image:  Duke and Duchess of Cambridge visit New Zealand
Kate and Will enjoy a wine tasting at the Amsfield Winery in New Zealand.FIONA GOODALL / POOL / EPA

12.

Image: Royal Family & Celebrities At The 20th Commonwealth Games
Kate gets fanned in the heat during the Commonwealth games on July 28, 2014 in Scotland.Chris Jackson / Getty Images

13.

Image: Prince William; Kate
How romantic! The royal couple walks behind a bagpiper as they arrive for a ceremonial tree planting in Ottawa, Canada.Nathan Denette / AP

14.

Image:
The Duke and Duchess are pictured in good spirits in London in 2011.BEN STANSALL / Pool via AP

15.

Image: Duchess of Cambridge goes into labor
Yellow is the happiest color! Here a supportive Will shares a loving look with Kate as they exit the King Edward VII hospital in central London, where she was seen for health issues during her first pregnancy.ANDY RAIN / EPA

16.

Image: The Duke And Duchess Of Cambridge Support Development Opportunities For Young People In South London
Smiles abound as Kate and Will visit the Stephen Lawrence Centre in London, England.WireImage

17.

Image: The Duke And Duchess Of Cambridge Tour Australia And New Zealand - Day 17
The couple laughs as they learn how to DJ at a youth community centre in Adelaide, Australia.Pool / Getty Images

18.

Image: The Duke And Duchess Of Cambridge Sighting In New York City - December 09, 2014
Hand in hand, Will and Kate leave St. Andrews' 600th Anniversary Dinner at the Metropolitan Museum of Art in 2014.James Devaney / Getty Images Contributor

19.

Image: Duke And Duchess Of Cambridge And Prince Harry Visit Tower Of London's Ceramic Poppy Field
A lovely sight: Kate and Will visit The Tower Of London's Ceramic Poppy Field in 2014.Getty Images file

20.

Image: Britain's Prince William and his wife Catherine Middleton, the Duchess of Cambridge, arrive at a citizenship ceremony at the Canadian Museum of Civilization in Hull
Kate and Will are all smiles as they arrive at a citizenship ceremony near Ottawa, Canada in 2011.BLAIR GABLE / Reuters

21.

Image: The Duke And Duchess Of Cambridge Make An Official Visit To Cambridge
The duo catch each other's eyes as they wave to the crowds from the balcony of Cambridge Guildhall on November 28, 2012.Chris Jackson / Getty Images file

22.

Image: Olympics Day 3 - Equestrian
How fun! Kate and Will attend the Eventing Cross Country Equestrian event during the London 2012 Olympic Games in 2012.Pascal Le Segretain / Getty Images

23.

Image: The Duke And Duchess Of Cambridge Canadian Tour - Day 5
Side by side, Kate and Will visit Province House on July 5, 2011 in Charlottetown, Canada.Pool / Getty Images

24.

Image: FILE  Prince William, Duke of Cambridge To Study Agricultural Management At Cambridge University
The very beginning! Here, Kate and Will are pictured on the day of their graduation from St Andrew's University in 2005.arence H / Getty Images

25.

Image: Prince William holds Prince George as Catherine, Duchess of Cambridge, gives him a toy during a visit to the Bilby Enclosure at Sydney's Taronga Zoo
One happy family: Will holds Prince George as Kate gives him a toy on April 20, 2014.POOL / Reuters

26.

Image:
Happily ever after! Will kisses his new wife, Kate, on the balcony in Buckingham Palace after their wedding.LEON NEAL / AFP - Getty Images