As King Charles III receives treatment for cancer just months after taking the throne, he remains Britain’s monarch.
But if the unthinkable happens, and the 75-year-old United Kingdom’s head of state dies?
The king’s older son, Prince William, is next in line for the throne. The crown does not pass from reigning monarchs to their spouses, so Queen Camilla is not in the line of succession.
Here is the order of succession:
1. Prince William, the older son of Charles and the late Princess Diana. He is known as Prince of Wales and is married to Kate, Princess of Wales. Their three children follow him in the line of succession.
2. Prince George of Cambridge, born in July 2013.
3. Princess Charlotte of Cambridge, born in May 2015.
4. Prince Louis of Cambridge, born in April 2018.
5. Prince Harry, the younger son of Charles and Diana, who has relinquished his royal duties but retains his place in line.
6. Archie Mountbatten-Windsor, born to Harry and Meghan, Duchess of Sussex, in May 2019.
7. Lilibet Mountbatten-Windsor, born to Harry and Meghan in June 2021.
8. Prince Andrew, Queen Elizabeth II and Prince Philip’s second-oldest son.
9. Princess Beatrice, older daughter of Andrew and his former wife, Sarah Ferguson.
10. Sienna Mapelli Mozzi, daughter of Beatrice and Edoardo Mapelli Mozzi, born in September 2021.
11. Princess Eugenie, Andrew and Ferguson’s younger daughter.
12. August Brooksbank, born to Eugenie and James Brooksbank in Feb. 2021.
13. Ernest Brooksbank, born to Eugenie and James Brooksbank in May 2023.
14. Prince Edward, the queen and Philip’s youngest child.
15. James, Viscount Severn, son of Edward and his wife, Sophie, Duchess of Edinburgh.
16. Lady Louise Mountbatten-Windsor, daughter of Edward and Sophie.
17. Princess Anne, second child and only daughter of Queen Elizabeth II and Prince Philip.
18. Peter Phillips, son of Anne and her ex-husband, Mark Phillips.
19. Savannah Phillips, older daughter of Peter Phillips and his ex-wife, Autumn Kelly.
20. Isla Phillips, younger daughter of Peter Phillips and Autumn Kelly.
21. Zara Tindall, daughter of Princess Anne and Mark Phillips.
22. Mia Tindall, older daughter of Zara and her husband, Mike Tindall.
23. Lena Tindall, younger daughter of Zara and Mike Tindall.
24. Lucas Tindall, son of Zara and Mike Tindall.
The Associated Press contributed to this article