Severne began her acting career in various theatre productions including playing Paola in a production of There's a Girl in My Soup, and was part of a company at the Wayside Chapel, Sydney.
Late 1960s Australian television appearances included The Mavis Bramston Show, and Contrabandits.
Severne also worked in the UK, starring in film comedy The Adventures of Barry McKenzie (1972), and making appearances in the TV anthology series Thriller and Moonbase 3 in 1973, and Father Brown in 1974.
(1981), four episodes of A Country Practice (1982 and 1984), and a role in TV movie Barracuda (1988).
Severne has been married to actor Henri Szeps since 1969, after meeting on the set of a play.