Thanatsaran Samthonglai (; born 12 July 2000), nicknamed Frank (), is a Thai actor. He is known for his main role as Tee in 'Cause You're My Boy (2018), Bantad in Blacklist (2019), and Phukong in 2gether: The Series (2020).
Thanatsaran was born in Loei Province, Thailand. He is currently taking up a vocational course on automotive at Panjavidhya Technological College.
In 2021, he left GMMTV after being required to serve in the military.
He owns a cat and eight dogs, five of which are shih tzu and rest are a pomeranian, a thai ridgeback and a bangkaew. He also likes to play football.