Lyn Ashley (born 18 March 1940 as Lynette Rumble) is an Australian actress who worked in the United Kingdom on television during the 1960s.

She is the daughter of actress Madge Ryan. Her television credits include Danger Man, Compact, Doctor Who (in the serial Galaxy 4), The Saint and Monty Python's Flying Circus. She also acted in films such as I'll Never Forget What's'isname (1967) and Quest for Love (1971).

She was also married to Monty Python member Eric Idle from 1969 until 1975; they have one son together, Carey, born in 1973. She was frequently credited on Monty Python's Flying Circus as 'Mrs Idle'.

She was later a cast member on the early 1990s soap opera Families.