Chaiwat "Tob" Thongsaeng (in Thai: ชัยวัฒน์ ทองแสง) born in Thailand on 18 April 1989 (Thai year 2532) is a Thai film actor and model and is best known for his lead role in the film Bangkok Love Story in Thai: เพื่อน...กูรักมึงว่ะ as Iht (Stone).
Chaiwat Tongseang graduated from Bangkok' Rittiyawannalai School, continuing at Sripatum University's Faculty of Arts specializing in Communications Art.
