Lin Si Yu
- Title: Lin Si Yu
- Popularity: 9.89
- Known For: Acting
- Birthday: 1991-06-02
- Place of Birth: Taiwan
- Homepage: https://www.asagency.cc/%e5%ae%87%e5%ae%99-%e6%9e%97%e6%80%9d%e5%ae%87-szuyu-lin/
- Also Known As: 宇宙 (A'N'D), 林思宇, Cosmos Lin, 宇宙, Szuyu Lin