Choi Moon-ju (; born August 4, 1985), better known as Choi Soo-eun (), is a South Korean actress and singer. She is a former member of South Korean girl group Gangkiz.
Soo-eun debuted as a member of the girl group Gangkiz in 2012, their group released mini album "We Became Gang" and repackaged mini album "Mama" in the same year. A year later, she left the group and became an actress.