Atthaphan Phunsawat (อรรถพันธ์ พูลสวัสดิ์; born 4 October 1993), nicknamed Gun (กัน), is a Thai actor, model and host under GMMTV. He started to study Business Administration at Bangkok University before changing majors, and is currently attending the Faculty of Political Science at Ramkhamhaeng University.

At a young age, Gun entered the entertainment industry supported by his mother who knew about her son's ambitions. He auditioned for film companies and became the first winner of The Boy Model Competition 2003. In 2004, he had his first main role in the series "Gomin" (โกมินทร์), one of his more popular works domestically.

Aside his acting career, Gun owns the clothing brand GENTE, a beauty products brand called Gun’s Shine Glow Gunand and co-owns another clothing brand Too Cute To Be Cool. He is also the co-owner of the café Last House on the Right.