Kate, 42, opted for a plaid Holland Cooper coat paired with a matching brown felt feather hat and dangling gold earrings. Meanwhile, William, 42, wore a crisp navy suit. On the way to church, the pair continued to smile and chat.

The trio was joined by King Charles III — who is also battling cancer— and his wife, Queen Camilla. The king and queen were dressed in traditional Scottish tartan outfits, with the monarch donning a green and red kilt with a gray blazer.

Charles’ brother, Prince Edward, and his wife, Sophie, Duchess of Edinburgh, made the church service alongside their son, James.

Earlier this month, Kate and William shared a video message from home following the end of the Paris Olympic Games.

The prerecorded footage showed the royal family members congratulating Great Britain’s athletes on their success in the games.

“From all of us watching at home, congratulations to Team GB,” Kate said in the clip posted to the duo’s X and Instagram accounts Aug. 11.

A month prior, Kate stepped out at Wimbledon after spending most of 2024 out of the spotlight.

The royal has attended the tennis match almost every year since marrying William in 2011 and, thanks to the All England Lawn Tennis and Croquet Club, has even been appointed to present prizes to the winners.

Princess Charlotte and Kate’s younger sister, Pippa Middleton, 40, were also in attendance.

The mom of three wore a bright purple dress, minimum jewelry and a beige handbag as she waved to the crowd.

According to People magazine, Kate’s appearance gave her “sustenance.”

“This will have given her sustenance,” a palace insider told the outlet. “She has gone through something awful and stressful, and it is crucial to have little wins to look forward to or to give you the courage and energy to go forward. And this was it.”

In March, Kate posted a video announcing that she had been diagnosed with cancer and was undergoing treatment.

“I wanted to take this opportunity to say thank you, personally, for all the wonderful messages of support and for your understanding whilst I have been recovering from surgery,” the princess shared in a video message. “It has been an incredibly tough couple of months for our entire family.”

Kate had previously undergone abdominal surgery in January and hadn’t been seen since.

“But I’ve had a fantastic medical team who have taken great care of me, for which I am so grateful,” she continued. “In January, I underwent major abdominal surgery in London and at the time, it was thought that my condition was non-cancerous. The surgery was successful.”

However, after the operation, further testing confirmed cancer had been present.

“My medical team therefore advised that I should undergo a course of preventative chemotherapy and I am now in the early stages of that treatment,” Kate said. “This of course came as a huge shock, and William and I have been doing everything we can to process and manage this privately for the sake of our young family.

“As you can imagine, this has taken time,” she went on. “It has taken me time to recover from major surgery in order to start my treatment. But, most importantly, it has taken us time to explain everything to George, Charlotte and Louis in a way that is appropriate for them, and to reassure them that I am going to be OK.”

Royal expert Robert Jobson said the princess is remaining tranquil despite the circumstances.

“She’s very calm,” the author told Hello! magazine. “She’s a person who wants to find solutions and rise above the noise and the drama, and I think, given what she’s gone through, you don’t want to waste any time on noise, on drama, when you’ve had anything to do with your health.”

Jobson added: “You live day by day; you do the things you want to do.”