Sim attended Radin Mas Primary School and CHIJ Saint Theresa's Convent.
She was discovered at 16 by a talent scout while attending the wedding of her aunt Ivy Chng, who was a runway model in the 1980s.
[3] In 2014, Sim filmed a toggle original series, Mystic Whisper and a long-running half hour drama, 118 that earned her first nominatation for Best Supporting Actress and Top 10 Most Popular Female Artistes in Star Awards 2016.
She also filmed The Dream Job, Hero and 118 II, which earned her second acting nomination for Best Supporting Actress in Star Awards 2018.
4 and Reach For The Skies, and toggle original series, VIC and a Singapore-Hong Kong collaboration drama, Blue Tick.