Thiraphat Sajakul, nicknamed Tui, is a Thai singer, actor, and radio station manager. He is the son of a former football club president, politician, and actor Wanatthana Satjakul. He completed his undergrad in the Faculty of Economics at Thammasat University, Thailand, then continued to study at the Art Institute of Seattle in America.

After returning to Thailand, Tui began modeling for an advertisement label called Black Label. Later, he made his debut in the series "Karm See Tarn Dorn". In addition, Tui released his first album with RPG in 2001 title "Teerapat" making his mark in the music industry.

He married actress and model Anna Natasha Plianwithee on December 20, 2008. Their son, Titan, was born on October 3, 2010.