Ong started out as a theatre student at the age of 13, and graduated from LASALLE College of the Arts with first class honours in Acting when she was 22 in 2018.
[2][3] She has since appeared in multiple shorts and stage productions, and has also been cast in MediaCorp's Channel 5 and Channel 8's drama series.
[4] In 2021, Ong starred as Lee Mui Ee, the lead role in the coming-of-age drama Teenage Textbook: The Series, which was based on the popular Singaporean novel of the same name.
[5][6][7] In 2023, Ong played a prominent role in Seven Days, also her debut feature film appearance.
[8][9] The same year, she played a spirit medium in the second season of the drama series Titoudao, a character based on a real-life person.