Beatrix Thomson (1900–1986) was a British stage actress. She also made a handful of appearances in film and television. A graduate of RADA, she made her West End debut in John Galsworthy's Loyalties in 1922. She was married to the actor Claude Rains from 1924 to 1935. Her film roles include Lucie Dreyfus in Dreyfus (1931) and the title role in Michael Powell's quota quickie Crown v. Stevens (1936). She also wrote several works for the stage.