She first met Prince Albert, her future husband, at a children's party when she was just five, and he was 10.
The Queen Mother was 14 when World War I broke out, and her eldest brother was killed in action.
Her family home, Glamis Castle, was turned into a home for injured soldiers and the Queen Mother helped run it.
After the war she met Prince Albert again, who quickly fell in love with her. They were quite different - he was very shy and she was lively and outgoing.
A Royal wedding
The Queen Mother married her Prince on 26 April 1923.
The young couple became the Duke and Duchess of York, and the Queen Mother made her first public appearance on the famous balcony of Buckingham Palace, in front of thousands of cheering fans.
The Queen Mother and Prince Albert had their first daughter, Elizabeth (who's now our Queen), in 1926. Then Princess Margaret was born four years later.
A royal scandal