Yim Si-wan (임시완), born Yim Woong-jae (임웅재), is an actor and member of the boyband ZE:A.
- Known For: Acting
- Birthday: 1988-12-01
- Place of Birth: Busan, South Korea
- Also Known As: Im Siwan, 임시완, 시완, Si-wan Yim, Im Si Wan, 임웅재, Yim Woong-jae, ZE:A, 任时完, Si-wan Im, Im Ung-jae, Im Woong-jae, Yim Ung-jae, Im Shi-wan