Elizabeth II became queen of the United Kingdom of Great Britain and Northern Ireland in 1952 upon the death of her father, George VI.
She is the second longest serving head of state, after the Thai King Bhumibol Adulyadej, who was crowned in 1946.
She is also head of state of 16 independent countries including Canada and Australia.
As a constitutional monarch, her role in the legislative process is largely ceremonial.
- Head of state: Government > Leaders > Head of state
- Head of state > Summary: Government > Leaders > Head of state > Summary
- Prime minister: Government > Leaders > Prime minister
- Prime minister > Profile: Government > Leaders > Prime minister > Profile
- Prime minister > Summary: Government > Leaders > Prime minister > Summary