Queen Elizabeth II becomes the first Canadian monarch to open up an annual session of the Canadian Parliament, presenting her Speech from the throne in Ottawa, Ontario, Canada.

A speech from the throne, or throne speech, is an event in certain monarchies in which the reigning sovereign, or a representative thereof, reads a prepared speech to members of the nation's legislature when a session is opened, outlining the government's agenda and focus for the forthcoming session, or in some cases closed. When a session is opened, the address sets forth the government's priorities with respect to its legislative agenda, for which the cooperation of the legislature is sought. The speech is often accompanied with formal ceremony and is often held annually, although in some places it may occur more or less frequently, whenever a new session of the legislature is opened.

Historically, when monarchs exercised personal influence and overall decision-making in government, a speech from the throne would outline the policies and objectives of the monarch; the speech was usually prepared by the monarch's advisers, but the monarch supervised the drafting of the speech at least to some extent and exercised final discretion as to its content. In modern constitutional monarchies, whether by law or by convention, the head of state or representative thereof reads the speech from the throne, but it is prepared by the ministers in cabinet.

Of contemporary European monarchies today, the United Kingdom, the Netherlands (Prince's Day), and Norway still practice the traditional "throne speech" given by the monarch, outlining the government's agenda, with similar ceremonial. In other countries the monarch may or may not attend the opening of the country's legislature, and may also give a speech, though these speeches differ from the traditional throne speech in that they do not outline any government agenda.

Many republics have adopted a similar practice in which the head of state, often a president, addresses the legislature; in the United States, the president makes an annual State of the Union address, in the Philippines the president makes an annual State of the Nation Address. In parliamentary republics where the president is merely a ceremonial figurehead, these speeches are often similar in tone to the throne speech of a constitutional monarchy, whereas in presidential systems such as the U.S. the speeches are somewhat different in that the president exercises personal discretion over the content but the principle of separation of powers means the legislature is not obligated to follow whatever agenda (if any) may be contained in such a speech.

Elizabeth II (Elizabeth Alexandra Mary; born 21 April 1926) is Queen of the United Kingdom and 14 other Commonwealth realms.Elizabeth was born in Mayfair, London, as the first child of the Duke and Duchess of York (later King George VI and Queen Elizabeth). Her father acceded to the throne in 1936 upon the abdication of his brother, King Edward VIII, making Elizabeth the heir presumptive. She was educated privately at home and began to undertake public duties during the Second World War, serving in the Auxiliary Territorial Service. In November 1947, she married Philip Mountbatten, a former prince of Greece and Denmark, and their marriage lasted 73 years until Philip's death in 2021. They had four children: Charles, Prince of Wales; Anne, Princess Royal; Prince Andrew, Duke of York; and Prince Edward, Earl of Wessex.

When her father died in February 1952, Elizabeth—then 25 years old—became queen regnant of seven independent Commonwealth countries: the United Kingdom, Canada, Australia, New Zealand, South Africa, Pakistan, and Ceylon, as well as Head of the Commonwealth. Elizabeth has reigned as a constitutional monarch through major political changes such as the Troubles in Northern Ireland, devolution in the United Kingdom, the decolonisation of Africa, and the United Kingdom's accession to the European Communities and withdrawal from the European Union. The number of her realms has varied over time as territories have gained independence, and as some realms have become republics. Her many historic visits and meetings include a state visit to the Republic of Ireland in 2011 and visits to or from five popes.

Significant events have included the Queen's coronation in 1953 and the celebrations of her Silver, Golden, Diamond and Platinum jubilees in 1977, 2002, 2012 and 2022 respectively. Elizabeth is the longest-lived and longest-reigning British monarch, the longest-serving female head of state in history, the oldest living and longest-reigning current monarch, and the oldest and longest-serving incumbent head of state. Elizabeth has occasionally faced republican sentiment and press criticism of the royal family, particularly after the breakdown of her children's marriages, her annus horribilis in 1992, and the death in 1997 of her former daughter-in-law Diana, Princess of Wales. However, support for the monarchy in the United Kingdom has been and remains consistently high, as does her personal popularity.