The couple marked their college graduation by capturing a warm portrait.
Middleton and Prince William were college buddies, and they both completed their studies at the University of St. Andrews in Scotland.
During the initial stages of their relationship, they displayed greater public affection.
At a sports event at Eton College in 2006, there is a visible moment where Prince William plants a kiss on Middleton's cheek, and they are also seen embracing with their arms around each other.
They exchanged a kiss in front of the cameras during their wedding ceremony.
After their wedding at Westminster Abbey in April 2011, the couple was captured sharing a kiss on the balcony of Buckingham Palace.
The recently married couple clasped hands as they headed to their honeymoon.
The couple exhibited their affection as they departed for their honeymoon.
Middleton and Prince William shared embraces during their tour of Canada after their wedding.
Cameras recorded their joyful expressions as they embraced in Charlottetown, Prince Edward Island, Canada
Middleton has been seen placing her hand on her husband's back.
In 2011, Middleton and Prince William made a visit to the recently opened Oak Centre for Children and Young People at Royal Marsden Hospital in Sutton, England
they don't frequently hold hands in public, there have been instances where Prince William has been observed placing his hand on Middleton's back.
During the 2012 wedding of Emily McCorquodale and James Hutt in Grantham, England, Prince William was observed with his hand resting on Middleton's back.
In 2012, another public kiss was witnessed at a polo event.
During their visit to Santa Barbara, California, Middleton expressed her congratulations to Prince William by giving him a kiss on the cheek after his polo match.
At the 2012 Olympics, as they watched the events as spectators, Prince William and Middleton were seen holding hands in their stadium seats.
During their presence at an equestrian competition at the Summer Olympics in London, the pair clasped hands and exchanged smiles.
Prince William and Middleton embraced each other when England achieved a victory in an event.
Middleton and Prince William appeared enthusiastic while observing the London 2012 Olympics.
during the Christmas season, Middleton and Prince William often display affection by holding hands.
The pair was photographed holding hands in 2013 at Sandringham in King's Lynn, England.
Prince William held Middleton's hand during a 2014 event in New York.
In 2014, the couple descended a staircase as they departed from a special dinner at the Metropolitan Museum of Art in New York City.
During their time in New York in 2014, they were frequently seen holding hands on multiple occasions.
Middleton and Prince William remained in close proximity as they entered The Carlyle Hotel in New York City.