William and Kate sealed their 2011 marriage with a kiss, as loud jets flew overhead.
William joked with Kate in April 2014 after she beat him during two yacht races in New Zealand.
Kate awarded her husband his prize at a 2011 polo match in Santa Barbara with a kiss.
Prince William and Kate spent Fourth of July in 2011 on Canada's Prince Edward Island.
Prince William and Kate hugged after Team GB won gold over France in track cycling at the 2012 London Olympics.
Kate upstaged William with her impressive DJ skills during their Australian tour in April 2014.
William helped Kate adjust her sweatshirt as the two embarked on a Canadian camping trip in July 2011.
William gave Kate a flower during their 2014 visit to Taronga Zoo in Sydney, Australia.
In 2011, the newlyweds kept close in Canada.
New parents Will and Kate were beaming when they introduced their son to the world on July 23, 2013.
Kate Middleton put a hand on Prince William's shoulder while they visited Bacon's College in London in July 2012.
Kate put her hand on William's leg during their April 2014 visit to the National Cycling Centre of Excellence and Avantidrome in New Zealand.
Catherine put her hand on her husband as they were presented with a surfboard on Sydney's Manley Beach during their 2014 tour of the country.
Will and Kate looked at each other during the 2012 Olympics.
Kate and William let out a laugh at the July 2011 prewedding festivities of Zara Phillips and Mike Tindall in Scotland.
Prince William and Kate got into the fun on day eight of their 2012 tour of the Asia Pacific.
The Duke and Duchess of Cambridge shared a sweet moment during their 2014 visit to Dunedin, New Zealand.
Will and Kate left their handprints at LA's Inner City Arts in 2011.
The newlyweds enjoyed themselves at a 2011 polo match in Santa Barbara.
William whispered something to Kate at Inner City Arts in LA during their 2011 visit to North America.
The royal couple were too cute at the 2012 Olympic Games in London.
Kate patted Will during their 2011 Summer tour of LA.
Kate and Prince William glanced lovingly at each other during an official visit to Cambridge, England, in November 2012.
Kate gazed at William when they introduced Prince George to the world in July 2013.
Kate and William got formal for the June 2012 trooping the color ceremony in London.
Will and Kate enjoyed a boat ride on day seven of the 2012 tour of the Asia Pacific.
The royal couple walked and chatted together on April 19, 2014, in Brisbane, Australia.
Prince William and Kate scaled a 130-foot tree near Malaysia's Danum Valley research center in 2012.
Prince William was quite the gentleman helping Kate with her shoe in March 2013 in England.
The royal pair cracked up during their 2014 trip to Australia.
Kate gave William a look of love as they arrived for another stop on their 2011 Canadian tour.
Kate listened to Will during their April 2014 visit to Echo Point in Katoomba, Australia.
Will helped Kate keep her balance during the 2012 Olympics.
In September 2012, William presented Kate with flowers during a stop in Kuala Lumpur.
On April 29, 2011, Will and Kate held hands during their first minutes as newlyweds!
William put his arm around Kate during a day at the races in June 2011.
Prince William and Kate talked while walking around the base of Uluru in Ayers Rock on their 2014 trip to Australia.
In July 2011, William and Kate visited an inner-city art program in LA and joked about each other's paintings.
William and Kate exchanged a playful knowing glance as they celebrated Canada Day during their North American royal visit in 2011.
Will and Kate kept their eyes on each other as they arrived with Prince Harry at the Sun Military Awards in December 2011.
Will and Kate looked relaxed in Honiara, Guadalcanal Island, in 2012.
Kate kept her eyes on Will at the London premiere of War Horse in January 2012.
The Duke and Duchess of Cambridge looked on during an official welcome ceremony at the Somba K'e Civic Plaza on July 5, 2011, in Yellowknife, Canada.
Prince William held the umbrella for Kate at the War Horse premiere in 2012.
The Duke and Duchess of Cambridge enjoyed themselves on their 2014 tour of Australia and New Zealand.
In December 2012, Prince William and Kate Middleton looked thrilled to leave the King Edward VII hospital in London after Kate was admitted for acute morning sickness.
The pair laughed and applauded during their 2012 visit to the Rainbow Centre.
Kate flashed William a smile in London in 2011.
Prince William and Kate posed with a 4-year-old dressed as a princess as they toured a Rolls-Royce factory in Singapore in 2012.
Will and Kate walked side by side into the premiere of African Cats in 2012.
Will and Kate were all smiles in Malaysia on day four of their 2012 tour.
William pointed something out to his wife, Kate, on their 2014 trip to Sydney, Australia.
Will and Kate were all smiles in the stands at the 2012 Summer Olympics.
During their 2011 Canadian tour, Will and Kate got close to chat at a Canada Day event.
Kate laughed while listening to Will during their 2014 visit to New Zealand.
Kate laughed while enjoying the 2012 show in Tuvalu.
The cute couple joked around with cricket bats in front of the Cricket World Cup during a 2014 reception at the Sydney Opera House.
Prince William held on to Prince George while Kate Middleton played with him at the zoo in Sydney, Australia, in April 2014.
Will and Kate chatted as they sat to create art at LA's Inner City Arts campus in 2011.
The couple cracked up as they practiced their best wingardium leviosa spells during a 2013 tour of the Harry Potter movie studio.
The couple glowed while introducing Prince George to the world in July 2013.
Kate laughed with Will as he held an Aboriginal spear at the National Indigenous Training Academy in Ayers Rock, Australia, during their 2014 tour.
At a Summer 2011 reception with California Governor Jerry Brown, William and Kate seemed to steal a moment alone.
Prince William stuck close to Kate Middleton at the June 2011 Wimbledon Championships.
The Duke and Duchess of Cambridge enjoyed each other's company at the Singapore Botanical Gardens in 2012.
Kate gave a loving glance to her husband as they planted a symbolic tree during their 2011 visit to Canada.
Kate and William enjoyed themselves at a concert for Canada Day in 2011.
Will and Kate shared a secret during their 2012 visit to Tuvalu.
Kate gave her husband a sweet look during the 2012 Olympics.
Kate shared a loving glance with William in April 2014 during their tour of Australia.
In April 2014, Kate gave Prince William the look of love while they visited the National Indigenous Training Academy in Ayers Rock, Australia.
The royal couple were having way too much fun as they signed a visitors book during a 2012 visit to Middle Temple in London.
Prince William and Kate shared a laugh in California in 2011.
Will and Kate shared a laugh during a two-day tour of Scotland in 2013.
Prince William helped Kate back to the car following a 2011 holiday visit to Centrepoint charity.
Prince William and Kate wore cowboy hats in Calgary during their 2011 tour of North America.
Kate and Will laughed wearing goggles at a Rolls-Royce factory in 2012.
The two laughed while preparing to throw a foam toy during an event in June 2012.
Kate cracked up while channeling her inner DJ in front of Prince William in Adelaide, Australia, during their April 2014 royal tour.
Kate flashed a smile at Prince William during a 2012 orchid-naming ceremony in honor of Princess Diana in Singapore.
Will and Kate held puppies during their April 2014 trip to Wellington, New Zealand.
During their 2011 North America tour, William and Kate got matching jerseys in Canada.
In 2012, Prince William and Kate walked together at a Word War II memorial in Singapore.
Kate smiled at Will, who looked handsome in sunglasses, as they took in a Wimbledon match in June 2011.
Will gave an adoring look to his wife on their 2012 Diamond Jubilee tour of the Far East.
Prince William and Kate kept close on their way into a 2012 royal appearance at the Imperial War Museum in London.
Kate laughed with Prince William during a June 2012 Diamond Jubilee event in London.
Kate and Prince William had plenty to laugh about during a July 2011 trip to Canada.
In 2011, Kate gave Prince William a funny look as he sampled some peanut paste at a UNICEF center in Copenhagen.
The Duke and Duchess of Cambridge toasted with water on day two of their 2012 tour in Singapore.
Prince William touched Kate's back as they arrived in Quebec City in 2011.
Kate and William only had eyes for each other during their 2011 visit to Canada.
Kate looked happy with Prince William at a 2011 charity event.
Kate gave William a smile as he waved to fans at a 2011 BAFTA event in LA.
Kate gave Prince William a loving look during the Epsom Derby in June 2011.
Prince William and Kate arrived in Tuvalu in 2012 by elevated hut.
Kate and Will gave each other loving looks during the ANZAC Day march at the Australian War Memorial in Canberra on April 25, 2014.
During their 2014 tour, Will and Kate cut the flower ribbon at the Botanical Gardens in Christchurch, New Zealand.
The Duke and Duchess of Cambridge walked the steps of the mosque together in Malaysia on day four of their 2012 tour.
The duke and duchess attended a dinner reception in aid of the National Memorial Arboretum Appeal at St James's Palace in London on Nov. 10, 2011.
Prince William cracked up Kate after they arrived in Ottawa in 2011.
The two had some fun at the Calgary Stampede Parade on July 8, 2011.
Will and Kate chatted with a young artist as they visited the Rainbow Centre on day two of the Diamond Jubilee tour of the Asia Pacific in 2012.
William and Kate flashed big smiles on day eight of their 2012 tour for the queen's Diamond Jubilee.
Will checked out Kate as they arrived for a 2011 polo match in Santa Barbara.
They managed to have some fun at a 2011 meeting of business leaders in California.
Kate and Prince William shared a laugh on Prince Edward Island in July 2011.
Prince William shared a funny moment with his wife as they enjoyed a cultural event in Singapore on day two of their 2012 tour.
Prince William and Kate shared a private moment in Tuvalu during their 2012 visit.
The duke couldn't keep his hand off a sparkling duchess at the 10th annual ARK gala dinner at Kensington Palace in 2011.