King Charles III on Friday delivered his first address as monarch following the death of his mother, Queen Elizabeth II.

In the speech, Charles called Elizabeth, who died at age 96 on Thursday, an “inspiration” and an “example” for him.

“Queen Elizabeth was a life well lived; a promise with destiny kept and she is mourned most deeply in her passing. That promise of lifelong service I renew to you all today,” he added.

The king, 73, added that he would “uphold the constitutional principles at the heart of our nation” and promised to serve the commonwealth “with loyalty, respect, and love as I have throughout my life.”