The Princess of Wales, a familiar presence at the annual diplomatic reception, was notably absent on Tuesday as her husband, Prince William, attended the white-tie event at Buckingham Palace solo.

Since making her debut at the event in 2013, Kate, 42, has missed it only once, in 2014, when it coincided with her and William’s visit to New York. Over the years, she has dazzled in elegant gowns and tiaras, including last year’s shimmering pink Jenny Packham dress paired with the Lover’s Knot tiara.

This year, however, has been challenging for the Princess, as she continues her recovery following a cancer diagnosis and completing chemotherapy in September. She is easing back into public duties and focusing her attention on her annual Christmas carol service at Westminster Abbey on December 6. The service will reflect on themes of support and togetherness, especially during life’s most challenging moments.

“Kate is very mindful of what lies ahead and is prioritizing her health and strength while setting her own pace,” royal biographer Robert Jobson shared with HELLO! magazine.

Royal author Robert Hardman echoed these sentiments, noting, “Her return to public life will be gradual, likely starting with more behind-the-scenes engagements tied to her early years initiatives. The Palace is managing expectations carefully to avoid the misconception that everything is back to normal.”

While Kate is set to host her Christmas concert, it remains unconfirmed whether she will participate in the upcoming state visit by the Emir of Qatar from December 3 to 4.