Bridgerton spin off Queen Charlotte has sparked viewer's interest in the history that inspired the story. The Netflix series explores the relationship between Queen Charlotte and King George III, and explores how the couple navigated their relationship through his mental health.
King George III's "madness" has been well documented in popular culture and the history books over the years but the cause of his illness is much debated among historians.
According to the Royal Family's official website, he experienced bouts of illness between 1788-89 and again in 1801. He became permanently deranged in 1810. In the last decade of his reign, his son George IV, acted as Prince Regent from 1811.