Dame Phyllis Irene Frost AC DBE JP (14 September 1917 – 30 October 2004) was an Australian welfare worker and philanthropist, known for her commitment to causes, such as helping prisoners.
She chaired the Victorian Women's Prisons Council for many years, established the Keep Australia Beautiful movement, worked for Freedom from Hunger and raised millions of dollars for charity.
She attended Presbyterian Ladies' College, Melbourne and the University of Melbourne, training in physiotherapy and, later, criminology. The latter would help her to better understand the female offenders, to whom she so staunchly committed her assistance.
She was appointed as Dame Commander of the Order of the British Empire (DBE) on 1 January 1974, for "outstanding service to the community", advancing from her 1963 CBE.
She died, aged 87, in Nunawading on 30 October 2004; survived by her three daughters.