Starting her career as a child actor, Kim gained significant recognition after her notable performance in the 2009 film "A Brand New Life," which led to her appearing at the prestigious Cannes Film Festival. Her accolades continued with starring roles in hit films like "The Man from Nowhere," which became South Korea's highest-grossing film of 2010, and the acclaimed thriller "The Neighbour," where she garnered numerous awards.

Kim's talent shone in additional projects, including the 2014 film "A Girl at My Door," and she appeared in the 2016 television drama "Mirror of the Witch." However, her career faced challenges following a drink-driving incident in 2022, which led to her withdrawing from the public eye; she was fined 20 million won (£11,000) for her actions in April 2023.

Her final performance was as part of Netflix's 2023 Korean drama "Bloodhounds," from which much of her role was reportedly cut due to her previous incident. The shock of her sudden death is reverberating through the South Korean entertainment industry, where Kim was once seen as one of its brightest rising stars.