She has played a wide array of characters since she was 12 years old and has appeared in many film roles and TV series on Australian screens.
She plays Classical Piano at Sixth Grade Level and she has studied ballet at the Gertrud Bodenwieser Dance Centre, Sydney.
[6] In 1991 Channel 9 introduced a new series called Chances, based around a family who won AUD$3 million in a lottery and the effect it had on their lives.
Deane-Johns played the part of Sharon Taylor, a good time girl who made a living as a hairdresser.
Deane-Johns was in the television film McLeod's Daughters in 1996 with Jack Thompson, Tammy MacIntosh and Kris McQuade.
In 2002, she was in the Canadian-Australian co-production of Guinevere Jones, a teenage fantasy series where she played the part of evil witch Morgana.
She describes the difficulties in working with misogynistic directors, unsympathetic make-up artists, bitchy co-stars and young actors who think they are God's gift to women.
As she relates in her cogitations Mercia's Missives: "I spent a lot of time in my room, writing a column for Playboy magazine, simply entitled Women.
As well as singing and acting Deane-Johns has done stand-up comedy and has ambitions to appear at the Edinburgh Festival Fringe one day.
[12] She has sung in many jazz trios and duos and also cover bands for Woodstock and Led Zeppelin, Joni Mitchell and Fleetwood Mac.
[13] There were many productions like Picnic at Hanging Rock with Helen Morse and Anne-Louise Lambert, My Brilliant Career with Judy Davis, Wendy Hughes and Sam Neill released in August 1979, Summerfield with Nick Tate, John Waters and Elizabeth Alexander made in 1977 and The Plumber with Judy Morris and Ivor Kants directed by Peter Weir in 1979.