Wannakorn Reungrat (; born 1 August 2000), formerly Pornthep Reungrat (), nicknamed FirstOne (), is a Thai actor under Domundi TV and a singer under DMD Music.
He is best known for his role as Jet in Khemjira (2026).
Early life and education Wannakorn was born on 1 August 2000 in Bangkok. He moved to Nakhon Si Thammarat when he was in the fifth grade (Prathom 5), Phitsanulok in the sixth grade, before settling in Chiang Mai in the seventh grade (Matthayom 1).
FirstOne graduated with a Bachelor of Engineering in Mechanical Engineering from Chiang Mai University.
Career In 2022, FirstOne appeared on the singing show The Star 2022 on One 31, but did not advance in the competition. FirstOne was invited to join Domundi TV while working as an extra in the series Club Friday Love & Belief: The Seven Year Itch (2022), starring Pruk Panich (Zee).
Domundi director Kittipat Jampa (Aoftion) gave him the name FirstOne, combining his nickname First with one, a homophone of the first syllable in his name Wannakorn. FirstOne shared that both words convey the meaning of being number one and since there are many people also named First, the new name would help people remember him.
FirstOne joined Domundi as a member of DMD Gen 3. He then appeared on the reality show DMD Friendship the Reality, which premiered in December 2023. The show brought together DMD Gen 3 members to develop their skills, such as modelling, singing and acting, while in search for a compatible on-screen partner. In the final episode, he received both the Best Friendship Award and the Best Performance Award.
FirstOne became acting partners with Matimun Sreeboonrueang (Tle) and the duo went on to co-star in the web series Secret Love (2024). FirstOne released his solo single "First Love" in April 2025.
Tle and FirstOne went on to star in Khemjira (2025), playing the roles of Charn and Jet, past life soulmates who help their friend Khemjira break his family curse. Following the success of the series, the cast headlined the Khemjira The Golden Time Concert, held at the Impact Arena on 17–18 January 2026.
DMD Music announced that Tle FirstOne would form a vocal duo, releasing their single "กลิ่นฝน (When It Rains)" in June 2026. The song won Most Popular Song at the Feed x Khaosod Awards 2026.
FirstOne is set to reprise his role as Jet in the special Khemjira Forever. He is also set to star in the upcoming series You(r)tuber, My Merman, and The Scent of Sorrow.
Discography Singles As lead artist Year Title Ref. 2025 "First Love"
Collaborations Year Title Artist Ref. 2024 "รักเธอเต็มฟีด (Love Feed)" DMD Boys "ศูนย์รวมความน่ารัก (Cuteness Center)" DMD Gen3 "The Way We Want" (feat. Tle & FirstOne) Three+One 2025 "ชอบแกล้ง ไม่ได้แกล้งชอบ" Tle & FirstOne "แค่เป็นห่วงเธอ" (feat. Tle & FirstOne) [Live Session] Ice Sarunyu "เธอไม่ชอบฝน (Rainfall)" [Old Days Version] Dome Jaruwat x Tle FirstOne 2026 "ขอให้เธอหายดี" Marr Team x Tle FirstOne "จุ๊บเธอ (Jubu Jub)" (feat. DMD Boys) DMD Cute Boys "กลิ่นฝน (When It Rains)" Tle FirstOne
Soundtrack appearances Year Title Album Ref. 2024 "เริ่มใหม่อีกครั้ง (Start Again)" To Be Continued OST 2025 "จากฝัน (Reality)" Khemjira OST "จากนี้จะไม่ปล่อยมือ (With You Always)" 2026 "เกี่ยวก้อย (Forever Entwined)" "ภพเธอ (Fated)" Love Upon a Time OST
Filmography Television series Year Title Role Network Notes Ref. 2022 Club Friday Love & Belief: The Seven Year Itch Unnamed lover (Leng's friend) One 31 Cameo (Ep. 2) 2025 Khemjira "Jet" Jettana Nakarnkul One 31, iQIYI Supporting role 2026 Khemjira Forever TBA You(r)tuber "Khun" Chopkhun Main role My Merman Pearl The Scent of Sorrow Lieutenant Supporting role
Television show Year Title Network Notes 2022 The Star 2022 One 31 2023 DMD Friendship the Reality Mandee Channel 2024 Sawatdee Khrap T-Boys!! 今、注目すべきタイのトップアーティストに密着 TV Tokyo, TVer DMD Friendship the Reality, It Takes Two One 31 Ep. 6 2025 T-Pop Stage Workpoint TV 24 April, 1 May 2025 ตมาเป็น Grow Up to Be One Playground Ep. 21 (26 September 2025) 4 ต่อ 4 Celebrity One 31 Ep. 964 (28 September 2025) The Wall Song Workpoint TV Ep. 272 (20 November 2025) จริงหรือมั่ว Fact or Fake One 31 Ep. 5 (1 December 2025) Goodbye ตายไม่รู้ตัว Workpoint TV Ep. 50 (15 December 2025) DMD Friendship the Reality, The Third Chapter iQIYI Ep. 2 2026 4 Podum One 31 Ep. 10 (21 January 2026) The Wall Song Workpoint TV Ep. 292 (9 April 2026), Ep. 316 (24 September 2026) แฉ Chae GMM 25 15 June 2026 T-Pop Stage Workpoint TV 18 June 2026
Web series Year Title Role NotesRef. 2024 Secret Love An Main role
Music video appearances Year Title Artist Ref. 2022 "ใจเกเร (Jai Gere)" Oat Pramote 2024 "เป็นเธอได้ไหม (Can It Be You)" Tle Matimun
Live performances Year Date Name Venue Ref. 2024 DMD Land 2: Wondershow Impact Arena DMD Land in Japan: Wondershow Tachikawa Stage Garden, Tokyo 2025 DMD Gen3 Fan Meeting: Friendship Never Ends Phenix Grand Ballroom DMD Sport Day BITEC Live 2026 – Khemjira The Golden Time Concert Impact Arena DMD World in Japan: Start to Bloom Toyosu PIT, Tokyo – DMD Land 3: The Final Land Impact Arena DMD Sport Day 2026: High School Vibes Indoor Stadium Huamark
Awards and nominations
| 2025 | The Viral Hits Thailand Spotlight Awards 2025 | Most Popular Couple | rowspan="3" | with Matimun Sreeboonrueang
| rowspan="25" | 2026 | rowspan="5" | Y Universe Awards 2025 | The Best Partner
| The Best Couple
| The Best Supportive | Khemjira
| The Best Cuties
| Rising Star
| Nine Entertain Awards 2026 | Shining Star of the Year | with Matimun Sreeboonrueang
| TOTY Music Awards 2025 | Popular Rookie of the Year | "First Love"
| Line Melody Music Awards 2025 | Black Melody of the Year | "Reality"
| rowspan="2" | Maya Superstar Idol Awards 2026 | Popular Male Couple of the Year | with Matimun Sreeboonrueang
| Rookie Male of the Year
| rowspan="2" | Kazz Awards 2026 | Couple of the Year | with Matimun Sreeboonrueang
| Youth Choice of the Year (2nd place)
| Kom Chad Luek Awards 2026 | Most Popular Thai Pop Singer
| Bangkok Pride Awards 2026 | Pride Popular of Y Series Star | rowspan="2" | with Matimun Sreeboonrueang
| rowspan="2" | Thailand Y Content Awards 2025 | Best Couple of the Year
| Rising Star of the Year
| Nakarat Awards 2026 | Popular Vote | rowspan="2" | with Matimun Sreeboonrueang
| Y Entertain Awards 2026 | Y Star on Spotlight of the Year
| rowspan="2" | Praew Awards 2026 | Praew's Cover of the Year | Harit Buayoi, Napatsakorn Pingmuang, Matimun Sreeboonrueang and Wannakorn Reungrat
| Supporting Actor of the Year | Khemjira
| Feed x Khaosod Awards 2026 | Most Popular Song | "When It Rains"
| rowspan="2" | Howe Awards 2026 | The Best Couple Award | with Matimun Sreeboonrueang
| Shining Male Award
| rowspan="2" | Maya TV Awards 2026 | Male Couple of the Year | with Matimun Sreeboonrueang
| Rising Star Male of the Year
References
External links