Cassie Walmer

Cassandra (Cassie) Walmer (20 June 1888 – 11 October 1980) was a British singer, dancer and comedian who performed in music halls and variety theatres in Britain, Australia and New Zealand from the 1890s until 1947. After 1919 she appeared in a duo act with Frank O'Brian under the name of Janice Hart, co-creating several revues with him, including Birds of the Night. She made successful tours of Australia in 1906–7, 1913, 1928–30 and 1935, two of which also included New Zealand. She also appeared on BBC radio from 1944 until 1952.

Sean Mayes and Sarah Whitfield describe her as one of "three extraordinary Black women" active in the early 20th century, commenting that they "challenge preconceptions about what might be possible in the first decade of the twentieth century".