Isabelle Keith (May 27, 1898, New York City – July 20, 1979, Mill Valley, California) was an American actress. She appeared in 42 films between 1919 and 1936, most of them from the MGM studio, and on two occasions with Laurel and Hardy. She is one of only two actresses to have played both Laurel's and Hardy's wife in Perfect Day and Be Big!, respectively, and the only one to have done so in the original English-language films (Linda Loredo has been Mrs. Hardy only in Spanish versions). She was sometimes credited as Claudelle Kaye, Elizabeth Keith, Isabelle Keep and Isobel Keep.