The new king devoted large parts of the speech to expressing grief over the queen's passing.
He also paid tribute to her long service to Britain and the Commonwealth.
- To my mother, I want to say: Thank you for everything you have done, said Charles III in the speech.
- She sacrificed large parts of her life to keep her promise to serve the people.
And she never broke that promise.
"Forced to give up interests"
He talked about times his mother went through as queen and that she always mixed her work with devotion and humility.
- Wherever you live around the world and whatever your background or faith, I will serve you with respect.
The king also mentioned that he will have to change his life now.
Among other things, his charity project will be taken over by others.
- I am now forced to give up my interests that I care about.
But I am confident that others will continue to work for these issues.
Tried the son
He ended the speech with a tribute to his son, Prince William, who will now be "Duke of Cornwall" and "Prince of Wales".
The king also sent a love greeting to Prince Harry and Meghan.
Only on Saturday will King Charles III take the oath and formally become king, however, the coronation ceremony will be delayed.
See SVT's entire live broadcast of the king's speech on SVT Play.