Moon Seung-ah (문승아) is a South Korean actress born on September 20, 2009. She achieved early critical recognition after winning the Best Actor Award in the Korean Competition at the Jeonju International Film Festival for her debut role in Scattered Night (2019). She earned global visibility portraying young Na Young / Nora in Celine Song's acclaimed romantic drama Past Lives (2023). Her other major feature film credits include Voice of Silence (2020), The Hill of Secrets (2022), and Girl with a Carrier (2025).