King Charles III followed in the steps of his late mother, Queen Elizabeth II, who died Thursday

by pledging the remainder of his life to the Commonwealth, much like she did at age 21.

The new king, 73, made his first official address as sovereign in a pre-recorded message broadcast Friday at 1 p.m. ET

6 p.m. local time, expressing grief, paying his respects to Queen Elizabeth, detailing changes to come and promising to serve.

The new king arrived at Buckingham Palace Friday afternoon 

and pre-recorded his speech in the Palace's Blue Drawing Room. 

The address comes at a time in which many Britons are preoccupied with an energy crisis,

the soaring cost of living, the war in Ukraine and the fallout from Brexit.

King Charles will be proclaimed by the Ascension council Saturday

and will make his public oath to the church and to "facilitate continuity of government."