Editing Sigrid Thornton (section)

===Early years===
Thornton was born in [[Canberra]], the daughter of [[Merle Thornton|Merle]], an academic and writer, and Neil Thornton, an academic.<ref>[http://www.filmreference.com/film/9/Sigrid-Thornton.html Sigrid Thornton: biography and credits]</ref> She was raised in Brisbane, attending [[St Peters Lutheran College|St. Peter's Lutheran College]]. For two years, she lived in London, where she was a member of the [[Unicorn Theatre]].

Back in Brisbane she attended [[Twelfth Night Theatre]] Junior Workshop and in 1970, during the [[James Cook|Captain Cook Bicentenary Celebrations]], Thornton appeared before [[Elizabeth II|Queen Elizabeth II]] as ''Rosa Campbell-Praed'' in ''Looking Glass on Yesterday''.{{sfn|Morris|1970|p={{page needed|date=May 2019}}}} Thornton was a student of noted theatre director, [[Joan Whalley]].