Princess Lilian, Duchess of Halland (born Lillian May Davies on 30 August 1915) was a beauty and fashion model in Britain.

In 1943 she met the Swedish Prince Bertil, Duke of Halland, in London, reportedly at a cocktail party held in honour of her 28th birthday. Soon after their meeting they became lovers, although she was at that time married to her first husband. They were married on 7 December 1976 at the church of Drottningholm Palace in the presence of the king and the queen.