Coralie Blythe (28 January 1881–24 July 1928), born as Caroline Maud Blyth, was an English actress and singer, who is best remembered for her numerous postcard photos and her roles in Edwardian musical comedy. Although she never became a big star, she worked steadily in London's West End and in British provincial theatres from her teen years until after World War I, especially for producer George Edwardes, and had a few roles in America. She sometimes performed with her husband, Lawrence Grossmith, and her brother, Vernon Castle.
Born in Bow in London, she was the eldest of three children of William Thomas Blyth (born 1857), a publican, and his wife Jane (née Finley) (1862–1897), an actress. Her brother was the dancer Vernon Castle.
Blythe's early theatrical appearances included West End roles replacing Marie Studholme as Gladys Stourton in the Edwardian musical A Gaiety Girl (1894) and in a pantomime, Santa Claus, over Christmas 1894. She had three roles in George Edwardes shows at the Prince's Theatre, Bristol: Lucille in The Circus Girl (1897–1898), Ada Branscombe in Three Little Maids (1902, also at the Theatre Royal, Nottingham) and The Orchid (1904–1905). In between these, she appeared at Edwardes's Gaiety Theatre in London in chorus roles in The Circus Girl, A Runaway Girl, A Greek Slave, San Toy and The Messenger Boy. In 1900 Blythe toured Britain in San Toy, and in 1901 she appeared in The Silver Slipper at the Lyric Theatre in London. Later that year, she played the small role of Maisie in The Toreador.