Britian's King Charles will attend the Easter Sunday service at St. George's Chapel in Windsor, in what will be his first public appearance at a traditional royal event since his cancer diagnosis was revealed in February.

Buckingham Palace said on March 26 that Charles, 75, and his wife Queen Camilla will attend church on March 31, typically an occasion for a gathering of senior royals.

The British Sovereign holds the title "Defender of the Faith and Supreme Governor of the Church of England" and is the s the Supreme Governor of the Church of England.

The King appoints archbishops, bishops and deans of cathedrals on the advice of the UK Prime Minister.

These titles date back to the reign of King Henry VIII, who was initially granted the title "'Defender of the Faith" in 1521 by Pope Leo X.

The announcement comes days after Kate, Princess of Wales, and the king's daughter in law, said she had also had a cancer diagnosis and was undergoing preventative chemotherapy.

The Easter service this year will be smaller in scale due to the king's health, Buckingham Palace said.

Kate and heir to the throne Prince William will not attend, their office had already announced.

Since his diagnosis, Charles has cut back his public appearances as he receives treatment.

He missed Commonwealth Day celebrations earlier in March, an absence from what is a significant occasion in the British monarchy's annual calendar.

But he appears to be gradually stepping up his public engagements.

He met faith leaders at Buckingham Palace earlier on March 26, who were part of a program aimed at fostering harmony and sharing experiences of leadership at a time of heightened geopolitical tensions.

The meeting was in support of a charity that brings together representatives of religious faiths, including Christian, Muslim and Jewish leaders.

Building bridges between religions and encouraging tolerance has been a long-standing cause for King Charles, the BBC reported.