Gillian Chung (鍾欣桐 Chung Yan-tung, originally 鍾嘉勵 (Chung Ka-lai)) is a member of the Cantopop group Twins alongside Charlene Choi. Prior to forming the group, she worked as a part-time model and studied in Melbourne, Australia. She was approached by EEG to form a group with Charlene and accepted, forming the group "Twins."

She has a younger sister, but she is not related to Charlene by blood. Upon their first release, people did have some difficulty telling them apart, although now they have developed their own distinct persona and personality.