(Photo : Photo by Joe Giddens - WPA Pool/Getty Images)

Prince William has withdrawn from his scheduled attendance at a memorial service honoring his godfather, the late King Constantine II of Greece, citing "a personal matter."

The decision comes amid Kate Middleton's ongoing recovery from abdominal surgery, as officially communicated by Kensington Palace.

"Unfortunately, The Prince of Wales is no longer able to attend the King Constantine Memorial Service this morning due to a personal matter," the palace said in an announcement Tuesday.

RELATED: Prince William Allegedly 'Surprised' By Prince Harry's Invictus Games Success, Royal Expert Claims 

Regarding the reason behind Prince William's non-participation, a source said there is no correlation between the personal matter affecting Prince William today and the health status of King Charles III. The monarch, King Charles III, disclosed in early February that he has been diagnosed with cancer, yet refrained from providing additional details. Currently, King Charles is undergoing treatment, and his medical advisors have recommended the postponement of public duties during this period.

(Photo : Photo by Jonathan Brady - Pool/Getty Images)

'Entertainment Tonight' reported that Middleton, 42, who underwent abdominal surgery in January, is reportedly in a positive state of well-being. Her last public appearance was in December when she participated in a Christmas morning church service in Sandringham alongside her family.

Prince William was observed more recently fulfilling an engagement at the British Red Cross headquarters in London on Feb. 20.

RELATED: Prince William Recognizes Emilia Clarke With A Medal For Her Charity Contributions 

In commemoration of King Constantine's life, other members of the royal family convened at Windsor Castle. Notable attendees included Queen Camilla, Prince Andrew, Sarah Ferguson, Princess Beatrice and her husband Edoardo Mapelli Mozzi, Princess Anne, and Zara Tindall, amongst others.

King Constantine died on Jan. 10, 2023. He was 82.