Prince William, Kate Middleton and King Charles.Photo:Darren Staples - Pool/Getty

YPRES, BELGIUM - JULY 31: Prince Charles, Prince of Wales greets Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge during a ceremony at the Commonwealth War Graves Commisions’s Tyne Cot Cemetery on July 31, 2017 in Ypres, Belgium. The commemorations mark the centenary of Passchendaele - The Third Battle of Ypres.

Darren Staples - Pool/Getty

Kate MiddletonandKing Charles' bond runs deep.Since her April 2011 wedding toPrince William, Princess Kate has fulfilled her royal duties wherever they take her, including several outings with the current monarch. More recently, however, their bond has taken an unexpected turn as they’re both dealing with cancer diagnoses, marking the first time in history two senior royals are navigating the disease at the same time.“They are in this together, Kate and the King,” royal biographer Sally Bedell Smithtold PEOPLE of the monarch and Kate’s shared experience.Take a look back at some of Kate Middleton and King Charles' best photos together.

Kate MiddletonandKing Charles' bond runs deep.

Since her April 2011 wedding toPrince William, Princess Kate has fulfilled her royal duties wherever they take her, including several outings with the current monarch. More recently, however, their bond has taken an unexpected turn as they’re both dealing with cancer diagnoses, marking the first time in history two senior royals are navigating the disease at the same time.

“They are in this together, Kate and the King,” royal biographer Sally Bedell Smithtold PEOPLE of the monarch and Kate’s shared experience.

Take a look back at some of Kate Middleton and King Charles' best photos together.

01of 10Longstanding BondKate Middleton and King Charles.John Stillwell - WPA Pool/GettyAfter Kate’s diagnosis was made public to the world on March 22, royal biographer Sally Bedell Smith told PEOPLE that King Charles “has always had a very good bond with her.““I don’t think it is presumptuous to say that she is like the daughter he never had,” she continued. “He shares with William an impulse to protect her. They are in this together, Kate and the King.“Their bond can be seen on this early visit — not long after Kate wed Prince William in 2011 when the two paid a visit to The Prince’s Foundation for Children and The Arts at Dulwich Picture Gallery in London to participate in crafts with some of the children.

01of 10

Longstanding Bond

Kate Middleton and King Charles.John Stillwell - WPA Pool/Getty

LONDON, UNITED KINGDOM - MARCH 15: Catherine, Duchess of Cambridge and Prince Charles, Prince of Wales iron artwork produced on silk during a visit to the Dulwich Picture Gallery on March 15, 2012 in Dulwich, south London, Englad. The Duchess of Cambridge joined her parents-in-law Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall on a royal visit to the gallery to celebrate their shared love of the arts and see work done by the Prince’s Foundation for Children and the Arts.

John Stillwell - WPA Pool/Getty

After Kate’s diagnosis was made public to the world on March 22, royal biographer Sally Bedell Smith told PEOPLE that King Charles “has always had a very good bond with her.”

“I don’t think it is presumptuous to say that she is like the daughter he never had,” she continued. “He shares with William an impulse to protect her. They are in this together, Kate and the King.”

Their bond can be seen on this early visit — not long after Kate wed Prince William in 2011 when the two paid a visit to The Prince’s Foundation for Children and The Arts at Dulwich Picture Gallery in London to participate in crafts with some of the children.

02of 10

Kate Middleton and King Charles.Danny Martindale/WireImage

LONDON, ENGLAND - MARCH 15: Catherine, Duchess of Cambridge and Prince Charles, Prince of Wales visit The Prince’s Foundation for Children and The Arts at Dulwich Picture Gallery on March 15, 2012 in London, England.

Danny Martindale/WireImage

Coincidence? The two even wore similar hues during the visit, which took place on March 15, 2012, a month shy of Kate’s first wedding anniversary.

03of 10Artsy OutingKate Middleton and King Charles.Chris Jackson - WPA Pool/GettyIn 2022, the Princess of Wales can be seen delighting her father-in-law in conversation as they visit the Clore Drawing Studio to speak to students.

03of 10

Artsy Outing

Kate Middleton and King Charles.Chris Jackson - WPA Pool/Getty

LONDON, ENGLAND - FEBRUARY 03: Catherine, Duchess of Cambridge speaks with Prince Charles, Prince of Wales at the Clore Drawing Studio where they meet students who practise life-drawing during their visit to The Prince’s Foundation training site for arts and culture with Camilla, Duchess of Cornwall at Trinity Buoy Wharf on February 3, 2022 in London, England.

Chris Jackson - WPA Pool/Getty

In 2022, the Princess of Wales can be seen delighting her father-in-law in conversation as they visit the Clore Drawing Studio to speak to students.

04of 10Special GreetingPrince William, Kate Middleton and King Charles.Darren Staples - Pool/GettyThe day before the Princess of Wales shared her diagnosis, the King and his daughter-in-law, who are seen here in 2017, shared aprivate lunchat Windsor Castle.Buckingham Palace said the monarch was “so proud of Catherinefor her courage in speaking as she did” in her announcement that was shared widely on March 22.

04of 10

Special Greeting

Prince William, Kate Middleton and King Charles.Darren Staples - Pool/Getty

YPRES, BELGIUM - JULY 31: Prince Charles, Prince of Wales greets Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge during a ceremony at the Commonwealth War Graves Commisions’s Tyne Cot Cemetery on July 31, 2017 in Ypres, Belgium. The commemorations mark the centenary of Passchendaele - The Third Battle of Ypres.

The day before the Princess of Wales shared her diagnosis, the King and his daughter-in-law, who are seen here in 2017, shared aprivate lunchat Windsor Castle.

Buckingham Palace said the monarch was “so proud of Catherinefor her courage in speaking as she did” in her announcement that was shared widely on March 22.

05of 10Family PortraitQueen Camilla, King Charles, Prince William and Kate Middleton.Chris Jackson/GettyBeing the four senior-most members of the royal family, Queen Camilla, King Charles, Prince William and Princess Kate often attend some of the royal family’s biggest events together. In this glamorous portrait, the four were dressed to the nines at The Diplomatic Reception in the 1844 Room at Buckingham Palace in December 2023.

05of 10

Family Portrait

Queen Camilla, King Charles, Prince William and Kate Middleton.Chris Jackson/Getty

LONDON, ENGLAND - DECEMBER 05: (EDITORIAL USE ONLY) (L-R) Queen Camilla, King Charles III, Prince William, Prince of Wales and Catherine, Princess of Wales pose for a photograph ahead of The Diplomatic Reception in the 1844 Room at Buckingham Palace on December 05, 2023 in London, England.

Chris Jackson/Getty

Being the four senior-most members of the royal family, Queen Camilla, King Charles, Prince William and Princess Kate often attend some of the royal family’s biggest events together. In this glamorous portrait, the four were dressed to the nines at The Diplomatic Reception in the 1844 Room at Buckingham Palace in December 2023.

06of 10Having a ChatKing Charles, Kate Middleton and Prince William.Danny Lawson - WPA Pool/GettyKate, the then-Prince of Wales and Prince William were clearly engaged in a lively chat during a visit to Dumfries House in Scotland in 2013.

06of 10

Having a Chat

King Charles, Kate Middleton and Prince William.Danny Lawson - WPA Pool/Getty

AYRSHIRE, UNITED KINGDOM- MARCH 05: Prince Charles, Prince of Wales, known as the Duke of Rothesay, Catherine, Duchess of Cambridge, known as the Countess of Strathearn, and Prince William, Duke of Cambridge, known as the Earl of Strathearn, when in Scotland during a visit to Dumfries House on March 05, 2013 in Ayrshire, Scotland. The Duke and Duchess of Cambridge braved the bitter cold to attend the opening of an outdoor centre in Scotland today. The couple joined the Prince of Wales at Dumfries House in Ayrshire where Charles has led a regeneration project since 2007. Hundreds of locals and 600 members of youth groups including the Girl Guides and Scouts turned out for the official opening of the Tamar Manoukin Outdoor Centre.

Danny Lawson - WPA Pool/Getty

Kate, the then-Prince of Wales and Prince William were clearly engaged in a lively chat during a visit to Dumfries House in Scotland in 2013.

07of 10

Cheek to Cheek

LONDON, UNITED KINGDOM - SEPTEMBER 28: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 24 HOURS AFTER CREATE DATE AND TIME) Prince Charles, Prince of Wales kisses Catherine, Duchess of Cambridge as they arrive to attend the “No Time To Die” World Premiere at the Royal Albert Hall on September 28, 2021 in London,

The future monarch greeted his daughter-in-law sweetly with a kiss on the cheek at the premiere ofNo Time To Dieat the Royal Albert Hall in 2021.

08of 10Something to Laugh AboutQueen Camilla, Prince William, Kate Middleton and King Charles.RICHARD POHLE/POOL/AFP via GettyCharles sure seems to bring a smile to his daughter-in-law’s face during an outing with William and Camilla to the Defence Medical Rehabilitation Centre in Loughborough in February 2020.

08of 10

Something to Laugh About

Queen Camilla, Prince William, Kate Middleton and King Charles.RICHARD POHLE/POOL/AFP via Getty

Britain’s Prince William, Duke of Cambridge (3L) and his wife Britain’s Catherine, Duchess of Cambridge (2R) talk with his father Britain’s Prince Charles, Prince of Wales (R) and his wife Britain’s Camilla, Duchess of Cornwall (2L) during their visit to the Defence Medical Rehabilitation Centre (DMRC) in Loughborough, central England on February 11, 2020. The DMRC currently provides services to a small group of veterans in the form of the Complex Prosthetic Assessment Clinic (CPAC), which is a joint MOD and NHS England commissioned outpatient clinic.

RICHARD POHLE/POOL/AFP via Getty

Charles sure seems to bring a smile to his daughter-in-law’s face during an outing with William and Camilla to the Defence Medical Rehabilitation Centre in Loughborough in February 2020.

09of 10Hats OnKing Charles and Kate Middleton.Chris Jackson/GettyThe two appeared in good spirits while sporting fabulous head pieces at the Order of the Garter Service at St George’s Chapel in June 2022 in Windsor.

09of 10

Hats On

King Charles and Kate Middleton.Chris Jackson/Getty

WINDSOR, ENGLAND - JUNE 13: Prince Charles, Prince of Wales and Catherine, Duchess of Cambridge attend the Order Of The Garter Service at St George’s Chapel on June 13, 2022 in Windsor, England. The Order of the Garter is the oldest and most senior Order of Chivalry in Britain, established by King Edward III nearly 700 years ago

The two appeared in good spirits while sporting fabulous head pieces at the Order of the Garter Service at St George’s Chapel in June 2022 in Windsor.

10of 10Big SmilesKing Charles, Kate Middleton and Prince William.Matt Dunham - WPA Pool / GettyA wider shot from the day shows Charles flashing a wide grin as he shares a moment with William and Kate, who looked lovely in bright blue.

10of 10

Big Smiles

King Charles, Kate Middleton and Prince William.Matt Dunham - WPA Pool / Getty

WINDSOR, ENGLAND - JUNE 13: Catherine, Duchess of Cambridge, Prince Charles, Prince of Wales and Prince William, Duke of Cambridge leave St George’s Chapel after the Order of the Garter service at Windsor Castle on June 13, 2022 in Windsor, England. The Order of the Garter is the oldest and most senior Order of Chivalry in Britain, established by King Edward III nearly 700 years ago. This year Prince Charles' wife Camilla, the Duchess of Cornwall, former British Prime Minister Tony Blair and former leader of the British House of Lords Baroness Amos were all installed in the Order.

Matt Dunham - WPA Pool / Getty

A wider shot from the day shows Charles flashing a wide grin as he shares a moment with William and Kate, who looked lovely in bright blue.

source: people.com