Born Huyen Dieu at a Vietnamese refugee camp in Sungai Besi, Malaysia, Jillian immigrated to Australia when she was 14 months old. She has trained at L'Ecole Philippe Gaulier in France and is a graduate of the University of Melbourne where she studied film, media and psychology. She recently wrapped the television drama 'One Night' for Paramount+, working alongside Jodie Whittaker and Yael Stone. She also made her animation debut in the lead role of Arkie in Nathan Jurevicius' 'Scarygirl', alongside Sam Neill, Ana Torv and Deborah Mailman. Jillian also featured in Noora Niasari's debut feature 'Shayda' - opposite award-winning Iranian actress Zar Amir Ebrahimi, which premiered at Sundance 2023 to much acclaim, as well as romantic sci-fi feature Loveland, co-starring Hugo Weaving and Kiwi comedy feature film Millie Lies Low (SFF 2022) from director Michelle Savill, which premiered at the 2022 Berlinale.