King Charles offered his heartfelt thanks in his annual Christmas message to the medical team that supported him and the rest of the royal family through illness.

A special look at Windsor Castle's festive display. ABC News' Lama Hasan reports.

Britain's royal family traditionally celebrates Christmas at Sandringham.

Britain's royal family traditionally celebrates Christmas at Sandringham.

Princess Kate says Christmas is one of her "favorite" times of year.

A royal source tells ABC News that King Charles will be continuing with his treatment into next year and that it is a “managed condition.”

The Prince of Wales and the actress discuss the new documentary, which explores stories from past Earthshot finalists, examines the global picture and highlights progress toward a sustainable future.

Prince William and Hannah Waddingham discuss their new documentary, “The Earthshot Report,” which premieres on PBS at 8 p.m. ET on Dec. 18.

The 42-year-old princess announced her cancer diagnosis in March.

William and Kate's three children George, Charlotte and Louis are heirs to the throne.

Kate has hosted the service each year since 2021.

Members of the royal family attended the "Together at Christmas" carol service at Westminster Abbey Dec. 6th, hosted by Princess Kate.

Kate joined Prince William and King Charles as they welcomed the leader of Qatar to the U.K. for a two-day state visit.

The state visit is the first for Kate since announcing her cancer diagnosis.

Kate will host her annual Christmas service at Westminster Abbey on Dec. 6.

Meghan, the Duchess of Sussex, was born and raised in California.

"GMA" takes a look at the festive transformation of Windsor Castle for the holiday season.

Kate was absent from this year's Diplomatic Corps reception at Buckingham Palace.

Masked intruders reportedly breached the perimeter of the royal estate.

Police received a report of a burglary on Sunday, Oct. 13 at Windsor Castle, but the King and Queen were not there at the time. No arrests have been made.

Fortunately for student Samantha Johnson, Prince William's apology helped her lecturer understand why she was behind!

William made a surprise visit to Ulster University in Belfast, Ireland.

The Princess of Wales joined her husband Prince William and other members of the British royal family at two weekend events honoring the country's fallen soldiers.

The princess is making a return to public duties after her cancer diagnosis.

The Princess of Wales made a big return to royal duties this weekend after Prince William called 2024 a brutal year for the family.

The Princess of Wales attended major ceremonies for the first time since announcing the end of her cancer treatments.

William spoke candidly with reporters while in South Africa.

The Prince of Wales opened up to reporters during his trip to South Africa, saying "it has probably been the hardest year in my life," with both his father and wife battling cancer.

William and his wife Kate Middleton are the parents of three children, George, Charlotte and Louis.

The British royal recalls how he and his brother were introduced to the issue by his late mother. He discusses his initiative in upcoming Disney+ documentary "Prince William: We Can End Homelessness."

ABC News’ Elizabeth Schulze shines a light on Prince William’s upcoming two-part documentary, “Prince William: We Can End Homelessness.”

A new documentary spotlights Prince William's initiative to combat homelessness.

The Prince of Wales gives a behind-the-scenes look at the work he has been doing to combat homelessness in his new two-part docuseries, which will premiere on Disney+.

Charles is visiting Australia in his first trip to overseas realms since becoming king.

Kate joined Prince William in Southport, England, marking her first public engagement since announcing her cancer diagnosis in March.

Kate Middleton announced in March that she was diagnosed with cancer.

Kate and husband Prince William visited Southport, England, the site of a knife attack at a local dance school in July.

Kate Middleton announced in March that she had been diagnosed with cancer.

Queen Elizabeth II died on Sept. 8, 2022, at the age of 96.

Beatrice is already the mother of a 3-year-old daughter and 8-year-old stepson.

Kate recently announced she has completed chemotherapy.

The Duchess of Wales held a meeting at Windsor Castle just one week after she released a video message announcing she had finished her chemotherapy treatment.

ABC News' Lama Hasan looks at a possible thaw in the relationship between Prince Harry and his father, King Charles III, and his brother, Prince William.

New Zealand's Black Ferns stopped by Buckingham Palace before playing the U.K.'s Red Roses when one of the team's players decided to ask for a royal hug.

The bronze statue is located in Antrim Castle Gardens in Northern Ireland.

Kate shared in a Sept. 9 video message that she had finished chemotherapy.

Kate announced in March she had been diagnosed with cancer.

Kate announced on March 22 that she had been diagnosed with cancer following her abdominal surgery in January.

Kate, the Duchess of Cambridge, said in a video message on Monday that she is focused on remaining "cancer-free" and gradually returning to work after completing chemotherapy.

Kate, the Princess of Wales, announced she completed her preventative chemo treatment on September 9, 2024.