Question: Who played king whose regal Name did Albert Adopt in the king's speech?

Knowledge 1: George VI
Albert assumed the regnal name "George VI" to emphasise continuity with his father and restore confidence in the monarchy. The beginning of George VI's reign was taken up by questions surrounding his predecessor and brother, whose titles, style and position were uncertain. He had been introduced as "His Royal Highness Prince Edward" for the abdication broadcast, but George VI felt that by abdicating and renouncing the succession Edward had lost the right to bear royal titles, including "Royal Highness". In settling the issue, George's first act as king was to confer upon his brother the title and style "His Royal Highness The Duke of Windsor", but the Letters Patent creating the dukedom prevented any wife or children from bearing royal styles. George VI was also forced to buy from Edward the royal residences of Balmoral Castle and Sandringham House, as these were private properties and did not pass to George VI automatically. Three days after his accession, on his 41st birthday, he invested his wife, the new queen consort, with the Order of the Garter. [SEP] Knowledge 2: The King's Speech
The King's Speech is a 2010 British historical drama film directed by Tom Hooper and written by David Seidler. Colin Firth plays the future King George VI who, to cope with a stammer, sees Lionel Logue, an Australian speech and language therapist played by Geoffrey Rush. The men become friends as they work together, and after his brother abdicates the throne, the new king relies on Logue to help him make his first wartime radio broadcast on Britain's declaration of war on Germany in 1939.
Knowledge 1: George VI
Albert assumed the regnal name "George VI" to emphasise continuity with his father and restore confidence in the monarchy. The beginning of George VI's reign was taken up by questions surrounding his predecessor and brother, whose titles, style and position were uncertain. He had been introduced as "His Royal Highness Prince Edward" for the abdication broadcast, but George VI felt that by abdicating and renouncing the succession Edward had lost the right to bear royal titles, including "Royal Highness". In settling the issue, George's first act as king was to confer upon his brother the title and style "His Royal Highness The Duke of Windsor", but the Letters Patent creating the dukedom prevented any wife or children from bearing royal styles. George VI was also forced to buy from Edward the royal residences of Balmoral Castle and Sandringham House, as these were private properties and did not pass to George VI automatically. Three days after his accession, on his 41st birthday, he invested his wife, the new queen consort, with the Order of the Garter. [SEP] Knowledge 2: George VI
In May and June 1939, the King and Queen toured Canada and the United States. From Ottawa, the royal couple were accompanied throughout by Canadian Prime Minister William Lyon Mackenzie King, to present themselves in North America as King and Queen of Canada. George was the first reigning monarch of Canada to visit North America, although he had been to Canada previously as Prince Albert and as Duke of York. Both Governor General of Canada Lord Tweedsmuir and Mackenzie King hoped that the King's presence in Canada would demonstrate the principles of the Statute of Westminster 1931, which gave full sovereignty to the British Dominions. On 19 May, George VI personally accepted and approved the Letter of Credence of the new U.S. Ambassador to Canada, Daniel Calhoun Roper; gave Royal Assent to nine parliamentary bills; and ratified two international treaties with the Great Seal of Canada. The official royal tour historian, Gustave Lanctot, wrote "the Statute of Westminster had assumed full reality" and George gave a speech emphasising "the free and equal association of the nations of the Commonwealth".
Knowledge 1: George VI
Albert assumed the regnal name "George VI" to emphasise continuity with his father and restore confidence in the monarchy. The beginning of George VI's reign was taken up by questions surrounding his predecessor and brother, whose titles, style and position were uncertain. He had been introduced as "His Royal Highness Prince Edward" for the abdication broadcast, but George VI felt that by abdicating and renouncing the succession Edward had lost the right to bear royal titles, including "Royal Highness". In settling the issue, George's first act as king was to confer upon his brother the title and style "His Royal Highness The Duke of Windsor", but the Letters Patent creating the dukedom prevented any wife or children from bearing royal styles. George VI was also forced to buy from Edward the royal residences of Balmoral Castle and Sandringham House, as these were private properties and did not pass to George VI automatically. Three days after his accession, on his 41st birthday, he invested his wife, the new queen consort, with the Order of the Garter. [SEP] Knowledge 2: George V
George V (George Frederick Ernest Albert; 3 June 1865 -- 20 January 1936) was King of the United Kingdom and the British Dominions, and Emperor of India, from 6 May 1910 until his death in 1936.

Answer: Colin Firth