She began her career starring in children's television shows Legacy of the Silver Shadow and Silversun, before appearing in the Australian soap opera Neighbours.
Her screen credits include a role in Legacy of the Silver Shadow and a main character Mara Lomax in children's sci-fi series Silversun.
[17] In 2013 she returned to work with Simon Stone on The Cherry Orchard for Melbourne Theatre Company where she interpreted Anya.
Mignon played contortionist Sarah Norden in the opening episode of Season 3 of Miss Fisher's Murder Mysteries in 2015.
[18] From 2014 to 2016 she collaborated on and performed in two projects with the German auteur Falk Richter- Complexity of Belonging in conjunction with choreographer Anouk van Dijk for Chunky Move and Je Suis Fassbinder with French theatre director Stanislas Nordey at the Théâtre National de Strasbourg[19] and Théâtre National de la Colline, Paris.