How Old Was Charles When He Became King? His Reign Explained
At 73, Charles became the oldest person ever to take the British throne, after the longest wait any Prince of Wales has endured. Here is the full story.
King Charles III did not simply become king; he became the oldest person in British history to do so, at the end of the longest apprenticeship any heir to the throne has ever served. Both facts say a great deal about the particular kind of reign that followed.
The oldest new monarch in British history
Charles was 73 years old when he acceded to the throne on 8 September 2022, following the death of his mother, Queen Elizabeth II, making him the oldest person ever to become British monarch. His coronation followed several months later, on 6 May 2023, once the customary period of mourning and preparation had passed.
More than five decades as heir
Before that, Charles held the title Prince of Wales for longer than anyone else in British history, having been invested with the title in 1969 and remaining heir apparent until his mother’s death in 2022, a wait of more than five decades. That extraordinary length of time shaped him considerably, giving him decades to develop the causes, from organic farming to architecture to youth charity, that defined his public life long before he ever wore a crown.
Why he chose to reign as Charles III
Reigning monarchs are not obliged to use their first name; King George VI, for instance, was born Albert and chose a different regnal name specifically to signal continuity after his brother Edward VIII’s abdication. Charles, born Charles Philip Arthur George, had several names available to choose from, yet opted to reign under his own first name, becoming Charles III rather than, say, George VII, a choice generally read as maintaining a straightforward continuity with his own identity rather than making any deeper symbolic statement.
Charles I and Charles II: not entirely comfortable company
The name Charles carries a genuinely complicated history in English royal memory. Charles I was executed in 1649 following the English Civil War, a deeply traumatic rupture in the monarchy’s history, and his son Charles II later returned from exile to restore the crown in 1660, a reign remembered for both restoration and its share of scandal. Choosing to reign as a third Charles meant knowingly stepping into that history rather than sidestepping it, a decision that attracted some commentary at the time but has caused no lasting difficulty in practice.
Is this the Carolean era?
Historians and royal commentators have floated the term “Carolean,” derived from the Latin “Carolus” for Charles, to describe the current reign, echoing how “Elizabethan” and “Victorian” describe earlier ones. The term has appeared in some coverage and academic discussion, though it has not been adopted with anything like the widespread, settled usage of its predecessors, and it remains genuinely unclear whether “Carolean” will stick as the accepted label for this era once more historical distance sets in.
A reign built on decades of preparation
What makes Charles’s accession at 73 particularly notable is how little adjustment it actually required of him. Unlike a younger monarch stepping into an unfamiliar role, Charles had spent over fifty years attending state functions, representing the Crown abroad, and developing the causes that now define his reign, giving him a level of institutional familiarity no incoming monarch in modern British history has matched.
Browse more of our Royal Figures stories for how King Charles III’s reign came to take its current shape.
Frequently asked questions
How old was King Charles when he became king?
73, making him the oldest person ever to become British monarch, following his mother Queen Elizabeth II’s death on 8 September 2022.
How long was Charles the Prince of Wales?
More than 50 years, from his investiture in 1969 until his mother’s death in 2022, the longest anyone has held the title in British history.
Why didn’t Charles choose a different regnal name, like George VII?
British monarchs can choose any regnal name, but Charles opted to reign under his own first name, becoming Charles III, a choice generally read as continuity with his identity rather than a deeper symbolic statement.
Who were Charles I and Charles II?
Charles I was executed in 1649 following the English Civil War. His son Charles II restored the monarchy in 1660 after years in exile. Charles III’s choice of regnal name knowingly follows two genuinely complicated predecessors.
What is the “Carolean era”?
A proposed term, derived from the Latin “Carolus” for Charles, used by some historians and commentators to describe the current reign, echoing “Elizabethan” or “Victorian.” It has not yet achieved widespread, settled usage.
When was King Charles III’s coronation?
6 May 2023 at Westminster Abbey, several months after his September 2022 accession.
Historical and biographical details are drawn from standard royal-historical references and royal.uk’s official accession records; correct as of 2026.
