30 April 1998|
DeJonge was born in 1998 in Melbourne, Victoria, the daughter of Robyn and Rob DeJonge, a businessman. She moved to Perth, Western Australia with her parents at the age of five, where she grew up in Peppermint Grove. She has studied at the Presbyterian Ladies' College, Perth.
In 2014, DeJonge made her feature film debut in the film The Sisterhood of Night; she starred along with Georgie Henley, Kara Hayward, and Kal Penn. Caryn Waechter directed the film, which was released on 10 April 2015, after getting a premiere in October 2014.
In 2015, DeJonge appeared in the Australian ABC's television drama series Hiding, on which she played one of the lead roles as Tara Swift / Shaneen Quigg. She played the co-lead role of Becca in the horror film The Visit, along with Ed Oxenbould. M. Night Shyamalan directed the film, which had its premiere on 31 August 2015, and was released on 11 September 2015 by Universal Pictures. In 2017, DeJonge starred as Alice Burbage in the TNT series, Will.
|2011||Good Pretender||Ally||Short film|
|2012||Eleven Thirty||Sally||Short film|
|2014||The Sisterhood of Night||Lavinia Hall|
|2015||The Visit||Becca||Nominee - 42nd Saturn Awards Best Performance by a Younger Actor|
|2017||Better Watch Out||Ashley|
|2015||Hiding||Shaneen Quigg / Tara Swift||8 episodes|
|2017||Will||Alice Burbage||10 episodes|
- Caccetta, Wendy (23 August 2015). "Perth schoolgirl Olivia DeJonge on her Hollywood movie The Visit". Perth Now. Sunday Times. Retrieved 30 July 2016.
- McRae, Ross (22 August 2015). "School can wait for Perth starlet". yahoo.com. Retrieved 10 September 2015.
- Scheck, Frank (9 April 2015). "'The Sisterhood of Night': Film Review". hollywoodreporter.com. Retrieved 10 September 2015.
- Yeap, Sue (5 February 2015). "No hiding place for successful Olivia". yahoo.com. Retrieved 10 September 2015.
- "The Visit (2015)". boxofficemojo.com. Retrieved 10 September 2015.