She was educated at Leeds Girls' High School[1][3] and, after evacuation with her mother to the United States during the Second World War, at Finch College in New York City.
[2] Returning to Britain in 1944, Ruby joined the Entertainments National Service Association and performed to British troops.
[5] Her West End theatre roles included performing as Golde in Fiddler on the Roof alongside Topol in 1984.
[2][6] In 2018, at the age of 93, she performed extracts from Momma Golda in a one-woman show at the King's Head Theatre in London.
[7] In 2024, Ruby publicly criticised the expansion of the Wimbledon tennis championships which she lives nearby.