A deputy prime minister or vice prime minister is, in some countries, a government minister who can take the position of acting prime minister when the prime minister is temporarily absent. The position is often likened to that of a vice president, but is significantly different, though both positions are "number two" offices. The position of deputy prime minister should not be confused with the Canadian office of the Deputy Minister of the Prime Minister of Canada, which is a non-political civil servant position (Nor does the Deputy Prime Minister of Canada act as a "number two"). The states of Australia and provinces of Canada each have the analogous office of deputy premier. In the devolved administrations of the United Kingdom, an analogous position is that of the deputy first minister.

A deputy prime minister traditionally serves as acting prime minister when the real prime minister is temporarily absent or incapable of exercising his/her power. For this reason the deputy prime minister is often asked to succeed to the prime minister's office following the prime minister's sudden death or unexpected resignation, although this is not necessarily constitutionally mandated.

A prime minister is the most senior minister of cabinet in the executive branch of government in a parliamentary system. In many systems, the prime minister selects and may dismiss other members of the cabinet, and allocates posts to members within the government. In most systems, the prime minister is the presiding member and chairman of the cabinet. In a minority of systems, notably in semi-presidential systems of government, a prime minister is the official who is appointed to manage the civil service and execute the directives of the head of state.

In parliamentary systems fashioned after the Westminster system, the prime minister is the presiding and actual head of the government and head of the executive branch. In such systems, the head of state or the head of state's official representative (i.e. the monarch, president, or governor-general) usually holds a largely ceremonial position, although often with reserve powers.

The prime minister is often, but not always, a member of parliament and is expected with other ministers to ensure the passage of bills through the legislature. In some monarchies the monarch may also exercise executive powers (known as the royal prerogative) which are constitutionally vested in the crown and may be exercised without the approval of parliament.

Nicholas William Peter "Nick" Clegg (born 7 January 1967) is the British Liberal Democrat Leader since 2007 and currently the Deputy Prime Minister and Lord President of the Council (with special responsibility for political and constitutional reform) in the coalition government of which David Cameron is the Prime Minister. Clegg has been the Leader of the Liberal Democrats since 2007, and a Member of Parliament (MP) representing Sheffield Hallam since 2005. He was previously a Member of the European Parliament (MEP) and an award winning journalist for the Financial Times.

Clegg was elected to the House of Commons at the 2005 general election and became the Liberal Democrats' Home Affairs spokesperson in 2006. Clegg became Deputy Prime Minister following the 2010 general election, when the Liberal Democrats formed a coalition government with the Conservative Party. As well as his parliamentary roles, Clegg has contributed to many pamphlets and books on political issues. He has also had a large number of jobs, including being a skiing instructor and working in the office of a bank in Helsinki.

John Leslie Prescott, Baron Prescott (born 31 May 1938) is a British politician who was the Deputy Prime Minister of the United Kingdom from 1997 to 2007. Born in Prestatyn, Wales, he represented Hull East as the Labour Member of Parliament from 1970 to 2010. In the 1994 leadership election, he stood for both Leader and Deputy Leader of the Labour Party, winning election to the latter office. He was appointed Deputy Prime Minister after Labour's victory in the 1997 election, with an expanded brief as Secretary of State for the Environment, Transport and the Regions.

A former ship's steward and trade union activist, by the 1980s he was presented as the political link to the working class in a Labour Party increasingly led by modernising, middle-class professionals. In his youth, Prescott managed to overcome the handicap of failing his 11-plus entrance examination for grammar school, going on to graduate from Ruskin College in Oxford. Prescott also developed a reputation as a key conciliator in the often tense relationship between Prime Minister Tony Blair and Chancellor of the Exchequer Gordon Brown.

Dmitry Olegovich Rogozin (Russian: Дми́трий Оле́гович Рого́зин; born 21 December 1963) is a Russian diplomat and politician, Ambassador Extraordinary and Plenipotentiary of Russia, vice-premier of Russian Government in charge of defense industry.

In January, 2008, he became Russia's ambassador to NATO., until December 2011. He was a leader of the Rodina (Motherland) party until it merged with other similar Russian parties to form the Fair Russia party. He speaks 4 languages and holds a doctor's degree.

On 18 February 2011 Russian President Dmitry Medvedev appointed Dmitry Rogozin as a Special Representative on anti-missile defence and negotions with NATO countries on this issue.

On 23 December 2011 Dmitry Rogozin was appointed deputy premier of Russian Government in charge of defense and space industry.

Dmitry Rogozin was born in Moscow in a family of a Soviet military scientist. He graduated from Moscow State University in 1986 with a degree in journalism and in 1988 graduated with another degree in economics. In 1996 he also got a PhD in philosophy.