Tonnam Piamchon Damrongsunthornchai
BIOGRAPHY
Tonnam Piamchon Damrongsunthornchai (Thai: ต้นน้ำ เปี่ยมชล ดำรงสุนทรชัย; born October 2, 1996) is a Thai actor who also sings and raps. In the 2026 Domundi TV historical Boys’ Love series Love Upon a Time he plays Chuay, the manservant attached to Nakun “Klao” Phattanatada. Chuay moves most freely between the noble household and the village, so he sees earliest that the man wearing Klao’s face is not Klao. The twelve episode series aired on Workpoint TV from March 27 to June 12, 2026. An uncut version ran on iQIYI.
He was born in Bangkok and studied law at Thammasat University, where he was placed in the Faculty of Law.
Music reached him before drama did. In 2019 he was a member of KissBoysTH, a five-piece Thai project boy group assembled through a reality format. The group debuted on May 21, 2019 and dissolved within the same year. He was one of its vocalists and its rapper, which is why he is described as both singer and rapper. The other four members were Jo, Mean, Saint and Peak.
His screen career began in 2017 with a guest turn as Mixer in Make It Right 2, and grew through the Thai Boys’ Love boom. He played Natee in Why R U? (2020) and Dr. Singharat “Sing” in Triage (2022). Ton-Rak “Ton” in Cutie Pie (2022) and Dom in Your Sky (2024) followed. He also appeared in Until We Meet Again and Love in the Air. He has also led two series, playing Chanin in It’s Ok to Be 30 (2023) and Khomkrit in Investigation of Love Season 2 (2025). He appears in The Thirsty 30 (2025).
On film he played Itt in My Sexdoll (2020) and Disco in Make Money (2020), both leads. He appeared in Love and Run (2019) and took a guest role as Hia in Dinosaur Love: The Movie (2023). Cutie Pie and Your Sky are both Domundi TV productions, the studio behind Love Upon a Time. In 2026 he also worked behind the camera as co-director of the five episode series Lost to Light.
In 2019 he also hosted the nine episode variety programme Kissboys, and his appearance in Until We Meet Again that year was a guest part.
The finale of Tonnam’s acting title and the premiere of his directing title fell eight days apart.
Love Upon a Time ran on Fridays at 21:30 and finished on June 12. Lost to Light began at 21:30 on Saturday, June 20.
The first is a twelve episode historical series from Domundi TV with Mandee Work, adapted from a web novel. The second is a five episode T-POP comedy from UltimateTroop Official and Excellent Film. It was co-directed with Nipitpon Muangsinun and cast with members of the group UltimateTroop.
Playing a servant in Ayutthaya-era costume and co-directing an idol comedy set in a failing music label are about as far apart as two Boys’ Love credits can be, and they sat on the schedule back to back.
In my view the list is most interesting for how many different jobs it holds, from rapper in a short-lived group to co-director. For a first look at him as a lead, It’s Ok to Be 30 is the place to start.
PROFILE DETAILS
- Native Name
- ต้นน้ำ เปี่ยมชล ดำรงสุนทรชัย
- Real Name
- Piamchon Damrongsunthornchai
- Former / Birth Name
- Also romanised as Piamchol Dumrongsoontornchai or Piamchon Damrongsoonthornchai.
- Nickname
- Tonnam (ต้นน้ำ), Tonnam Piamchon
- Pronouns
- he/him
- Born
- (Age 30)
- Birthplace
- Bangkok, Thailand
- Gender
- Male
- Western Zodiac
- Libra ♎
- Chinese Zodiac
- Rat 🐭
- Nationality
- Debut
- 2017 · Make It Right 2 (2017) as Mixer
- Years Active
- 2017-present
- Languages
- Thai (native)
- Skills
- Acting, Singing, Rapping, Modeling
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