LONDON, DEC 4 : Queen Camilla made a radiant appearance at a state banquet in Buckingham Palace in honour of the Amir of Qatar, Sheikh Tamim bin Hamad Al Thani, marking her return to official duties after a recent illness, according to People magazine.

Last month, Buckingham Palace said Queen Camilla cancelled multiple events due to a chest infection, including Remembrance events. It is understood that she is recovering well, but continues experiencing episodic symptoms of post-viral fatigue from the chest infection. She told guests at the palace Tuesday that the recent infection was a form of pneumonia.

Camilla, 77, dazzled in a red velvet evening gown by Fiona Clare and adorned the diamond Kokoshnik tiara, a striking accessory once owned by Queen Elizabeth II. Despite her recent health struggles, she appeared composed and poised, welcoming the Amir and his wife Sheikha Jawaher bint Hamad bin Suhaim Al Thani, to the U.K.

While other royal family members including Prince William, attended, Kate Middleton skipped the dinner. However, Kate did help welcome the guests earlier in the day. The Princess of Wales, 42, recently completed chemotherapy and has slowly returned to royal duties.

In his speech, King Charles, 76, said the evening “may be seen as a homecoming,” as the Amir studied in the U.K.

“Just as our parents served and worked hard to confront the challenges of their ages, so too must we,” Charles said. “And at such times of uncertainty and upheaval, old friendships assume ever greater importance.”