- Gender: Female
- Birthday: 1890-12-20
- Day of Death: 1958-09-20 ( 68 years old )
- Place of Birth: Bordeaux, Gironde, Aquitaine, France
- Also Known As: Germaine Yvonne Arnaud
Germaine Yvonne Arnaud was a French-born pianist, singer and actress, who was well known for her career in Britain, as well as her native land. After beginning a career as a concert pianist as a child, Arnaud acted in musical comedies. She switched to non-musical comedy and drama around 1920 and was one of the players in the second of the Aldwych farces, A Cuckoo in the Nest, a hit in 1925. She also had dramatic roles and made films in the 1930s and 1940s, and continued to act into the 1950s. She occasionally performed as a pianist later in her career. The Yvonne Arnaud Theatre was named in her memory in Guildford, Surrey.