This appearance is notable since it's King Charles' most significant public engagement after disclosing his cancer diagnosis earlier this year.

The couple, greeted warmly by spectators, took part in the long-standing royal tradition of attending the Easter service, although Prince William and Catherine were absent due to Catherine's recent cancer diagnosis.

King Charles, showing resilience despite his health issues, has been active behind the scenes and attending official functions when possible.

Recently, he shared an Easter message and met with various community leaders, highlighting ongoing engagements despite his treatment for cancer, announced this February after surgery in January for a benign prostate condition revealed an unrelated cancer.

The monarchy faces a unique challenge with both King Charles and Catherine undergoing cancer treatment. Charles has expressed gratitude for the support received and praised Catherine's bravery.

Catherine was last publicly seen in December before her diagnosis was disclosed last week, with her return to public duties planned post-Easter.