George IV was King of the United Kingdom from 1820 until his death in 1830. He was born on August 12, 1762, and was the eldest son of King George III. Before becoming king, he served as Prince Regent from 1811 due to his father's mental illness. George IV is known for his extravagant lifestyle and patronage of the arts. He played a significant role in the development of Regency architecture and was instrumental in the construction of the Royal Pavilion in Brighton. His reign was marked by political unrest and the ongoing struggle for reform in Britain.