High Quality Content by WIKIPEDIA articles! George IV (George Augustus Frederick; 12 August 1762 – 26 June 1830) was the King of the United Kingdom of Great Britain and Ireland and also of Hanover from the death of his father, George III, on 29 January 1820 until his own death ten years later. From 1811 until his accession, he served as Prince Regent during his father`s relapse into mental illness.