Gems Kantapat Dewitpattanapong

Gems Kantapat Dewitpattanapong (Thai: เจ็ม กันตพัฒน์ เตวิชพัฒนพงศ์; born January 2, 2004) is a Thai actor and model signed to Domundi TV. He plays Lantao in Your Third (2026), and reached that role three years into a career that began with a four-episode guest part.

He was born in Lampang, in northern Thailand, and has been studying for a bachelor’s degree in automotive engineering at Lampang Technical College alongside the acting. Domundi announced him in late 2023, and his early credits sit inside the company’s own productions and reality output rather than coming from outside casting.

His debut was a guest role as Thames in Naughty Babe (2023), four episodes. DMD Friendship The Reality followed the same year, running to six episodes with a further guest appearance in 2024, and the Japanese programme Sawatdee Khrap T-Boys!! gave him ten episodes in 2024 as part of a group profile of Thai performers.

The first substantial acting role came in July 2024 with Battle of the Writers, where he played Ozone across twelve episodes. Your Sky in 2025 gave him two separate single-episode credits, and Love Upon a Time in April 2026 five episodes as A Chai. Your Third, at twelve episodes, is the longest run he has had.

He is credited across sources under two different legal names. Thai press, Domundi’s own artist listing and the distributor’s series pages give him as Kantapat Dewitpattanapong, while structured film databases still carry the earlier Jassada Janmano. His social handles moved to match the newer name. This page uses the name his agency and the distributor use, and records the earlier one so older credits can be traced.