Nathania Ong

Ong was born in 1998^[1][2] to dentist and former a cappella singer Kevin Ong and homemaker Jenny Ong.^[3] She has three older sisters.^[4] Ong enjoyed singing from a young age and often performed at City Harvest Church concerts,^[3][5] but only began to be formally trained at age 11.^[4]

Ong received her primary education at Methodist Girls' School.^[3][6] She was a member of the Drama Elective Programme at Anglo-Chinese Junior College. After completing her Singapore-Cambridge GCE Advanced Level examinations in 2017, she applied to study at several overseas drama schools, but failed to be accepted by any of them.^[4] She then enrolled at Lasalle College of the Arts in Singapore but dropped out after a year to reapply to schools in the United Kingdom.^[7] In 2021, she graduated from Mountview Academy of Theatre Arts with a Bachelor of Arts in musical theatre.^[8]

In 2010, Ong led the singing of Majulah Singapura at the closing ceremony of the inaugural Youth Olympic Games in Singapore.^[4] She made her West End debut in 2021 as Jenna Rolan in Be More Chill.^[9] The same year, she played Éponine in the UK and Ireland tour of Les Misérables, despite not having seen the musical prior to auditioning for the role.^[10] In 2022, she began playing Éponine in the West End production at the Sondheim Theatre.^[4] She returned to Singapore in 2023 to play Cinderella in a local adaptation of Into the Woods.^[8] In 2024, she was cast as Eliza in the West End production of Hamilton at the Victoria Palace Theatre.^[11] In 2026, she was included in the Forbes 30 Under 30 list.^[12] She is set to play Elle Woods in the Singapore Repertory Theatre's production of Legally Blonde in 29 July 2026.^[13]