We have to define Head of Government for this. Technically there are two definitions for democratic monarchies like the UK So The Prime minister is the head of government. But so is the Queen.
The head of the government is the prime minister Jóhanna Sigurðardóttir.
Great Britain does not have a leader because it is not a country. The head of state of the United Kingdom is Queen Elizabeth II. The current head of government in the UK is David Cameron.
The head executive of the US government is the President, Barack Obama.
the current head of the Canadian government is Conservative party leader Stephen Harper. He leads a minority government.
David Cameron is the current UK Prime Minister and Queen Elizabeth II is Head of State.
Hu Jinto
Current answer: Federal Democratic Republic of Nepal President as head of the state and Prime Minister as head of the government.
The current head of the government of the state of California is Governor Arnold Schwartzenegger.
The current governer is Gary herbert
The Head of Government of Jamaica is the Prime Minister. The current Prime Minister is the Hon. Orrette Bruce Golding.
The head of the government of South Africa is the president. The current president of South Africa is Jacob Zuma.