The Right Honourable (abbreviated as The Rt Hon., The Rt Hon or The Rt. Hon.) is an honorific prefix that is traditionally applied to certain people in the United Kingdom, Canada, Australia, New Zealand, the Anglophone Caribbean and other Commonwealth Realms, and occasionally elsewhere. Examples of this are The Right Honourable David Cameron PC MP, Prime Minister of the United Kingdom; The Right Honourable Stephen Harper PC MP, Prime Minister of Canada; and The Right Honourable John Key MP, Prime Minister of New Zealand.

The following persons are entitled to the prefix in a personal capacity:

In addition, some people are entitled to the prefix in an official capacity, i.e. the prefix is added to the name of the office, not the name of the person:

"The Right Honourable" is also added as a prefix to the name of various collective entities, e.g.:

See also the collective use of "Most Honourable," as in "The Lords of Her Majesty's Most Honourable Privy Council" (the Privy Council).

The honorific is normally used only on the front of envelopes and other written documents: for example, the Rt Hon. Ann Widdecombe was otherwise referred to simply as "Miss Widdecombe" before she left parliament at the 2010 election.

RT may refer to:

Edward Samuel Miliband (born 24 December 1969) is a British Labour Party politician, currently the Leader of the Labour Party and Leader of the Opposition. He has been the Member of Parliament (MP) for the South Yorkshire constituency of Doncaster North since 2005 and served in the Cabinet from 2007 to 2010 under Prime Minister Gordon Brown. He and his brother, David Miliband, were the first siblings to sit in the Cabinet simultaneously since Edward, Lord Stanley, and Oliver Stanley in 1938.

Born in London, Miliband graduated from Corpus Christi College, Oxford and the London School of Economics, becoming first a television journalist and then a Labour Party researcher, before rising to become one of Chancellor Gordon Brown's confidants and Chairman of HM Treasury's Council of Economic Advisers.

As Prime Minister, Gordon Brown appointed Miliband as Minister for the Cabinet Office and Chancellor of the Duchy of Lancaster on 28 June 2007. He was subsequently promoted to the new post of Secretary of State for Energy and Climate Change, a position he held from 3 October 2008 to 11 May 2010. On 25 September 2010, he was elected Leader of the Labour Party.

John Phillip Key (born 9 August 1961) is the 38th Prime Minister of New Zealand, in office since 2008. He has led the New Zealand National Party since 2006.

Born in Auckland before moving to Christchurch when he was a child, Key attended the University of Canterbury and graduated in 1981 with a bachelor of commerce, also later undertaking management studies at Harvard University in Boston. He began a career in the foreign exchange market in New Zealand before moving overseas to work for Merrill Lynch, in which he became head of global foreign exchange in 1995, a position he would hold for six years. In 1999 he was appointed a member of the Foreign Exchange Committee of the Federal Reserve Bank of New York until leaving in 2001.

Key entered the New Zealand Parliament representing the Auckland electorate of Helensville as one of the few new National members of parliament in the election of 2002 following National's significant defeat of that year. He has held the seat since then. In 2004, he was appointed Finance Spokesman for National and eventually succeeded Don Brash as the National Party leader in 2006. After two years as Leader of the Opposition, Key led his party to victory in both the November 2008 and the November 2011 general elections.

Winston Raymond Peters (born 11 April 1945) is a New Zealand politician and leader of New Zealand First, a political party he founded in 1993. Peters has had a successful and turbulent political career since entering Parliament in 1978, first serving as a Cabinet Minister in the Bolger Government before being sacked in 1991. As leader of New Zealand First, he held the balance of power after the 1996 election and formed a coalition with National, securing the positions of Deputy Prime Minister and Treasurer. However, the coalition dissolved in 1998 following the replacement of Bolger by Jenny Shipley as Prime Minister.

In 1999 New Zealand First returned to Opposition before entering into a government again with the Labour Party in 2005, in which he served as the Minister of Foreign Affairs. On 29 August 2008 he stood down as a Minister pending a police investigation into a funding scandal involving Peters and New Zealand First.

In the 2008 general election, New Zealand First failed to reach the five percent threshold and Peters did not regain his seat. As a result, neither Peters or New Zealand First were returned to Parliament. However, in the 2011 general election New Zealand First experienced a resurgence in support, winning 6.59 percent of the party vote to secure eight seats in Parliament.