A prolific and commercially successful British author, she is known for her romance novels. Her more than 700 books sold nearly 800 million copies worldwide.
Early in her career, she wrote a gossip column for The Daily Express. She published her debut novel, Jigsaw, in 1922.
She had a brief stint as an aviator.
She was the daughter of a British Army officer. She was married twice and had three children.
She is the step-grandmother of Princess Diana.