She achieved fame in her homeland when she appeared in the 1971 BBC Scotland television series Sunset Song, an adaptation of Lewis Grassic Gibbon's novel, in the lead role of Chris Guthrie.
[3] From the first episode in 1980, she played district nurse Kay Grant in the Scottish Television soap opera "Take The High Road".
Other television appearances include Lord Peter Wimsey (TV series), (The Unpleasantness at the Bellona Club, one episode); Hetty Wainthropp Investigates; Taggart; The New Statesman; and Poirot.
[1] On stage she has played Elizabeth in Richard III opposite Derek Jacobi and Blanche DuBois in A Streetcar Named Desire at the Royal Lyceum Theatre in Edinburgh.
[10] Heilbron met actor Jonathan Cecil when they were both studying at the London Academy of Music and Dramatic Art, and the couple married in 1963.