 On 10 December 1952 she married Victor Benjamin Vorwerg, a civil engineer.Collier became more widely known in Australia during 1953–54 while performing Magda Sorel in Gian Carlo Menotti's "The Consul", for a total of seventy-five performances in Melbourne, Sydney and regional areas.Collier studied in Milan in 1955, where she was auditioned by Lord Harewood.