Question: are all 4 lennon sisters still alive?
Answer: Lennon Sisters in 1971 and 1955. ... In 1999, younger sister Mimi (born Miriam Theresa; October 16, 1955) replaced Peggy upon her retirement. Dianne has also since retired. The current line-up of the Lennon Sisters is a trio consisting of Mimi, Janet and Kathy.