Ashleigh Cummings ( born 11 November 1992 ) is an Australian actress . She became known for her role as Robyn Mathers in '' Tomorrow , When the War Began '' . The film , based on the book of the same name , earned Cummings a nomination for Best Young Actor at the 2010 Australian Film Institute Awards . Cummings is also known for her role as Dorothy Williams in ABC1 's '' Miss Fisher 's Murder Mysteries '' and her role as Debbie Vickers in '' Puberty Blues ''
2010 Australian Film Institute Awards
2010 Australian Film Institute Awards
Ashleigh Cummings