George IV was King of the United Kingdom from 1820 until his death in 1830. He was the eldest son of King George III and became known for his extravagant lifestyle and patronage of the arts. His reign saw significant political changes, including the passing of the Reform Act of 1832, which began the process of electoral reform. Before becoming king, George IV served as Prince Regent from 1811 due to his father's mental illness. He was known for his lavish spending and interest in architecture, commissioning the famous Royal Pavilion in Brighton. His reign was marked by both cultural achievements and political challenges.