King Charles lll formally proclaimed as UK's new monarch

King Charles lll has been formally proclaimed as the UK's new monarch. He sweared an oath during an ceremony at at St James's Palace, the BBC reports.

The King, who ascended to the throne Thursday after Queen Elizabeth II’s death, named his eldest son William as Prince of Wales.

King Charles paid tribute to his mother, the late Queen, in a speech during his proclamation saying: "Her reign was unequalled in its duration, its dedication and its devotion. Even as we grieve, we give thanks for this most faithful life."

The new King added: "In carrying out the heavy task that has been laid upon me, and to which I now dedicate what remains to me of my life, I pray to the guidance and help of almighty God."

The monarch has now signed the oath, and witnesses including his son, Prince William, are adding their signatures to the document.