Seth Yancy Fronda Fedelin (born July 9, 2002) is a Filipino actor and singer. Fedelin first appeared on television as a housemate on the reality show (2018). He has since appeared in various films and television series, such as Kadenang Ginto (2019), Huwag Kang Mangamba (2021), and Dirty Linen (2023). He also starred in My Future You, an official entry to the 50th Metro Manila Film Festival on December 25, 2024, and won two awards: Breakthrough Performance in the MMFF Gabi Ng Parangal held at Solaire Grand Ballroom in Parañaque City and Best Actor at Manila International Film Festival held in Los Angeles, California.
He graduated in junior high school at Dasmariñas Integrated High School in 2019 and completed senior high school at Jesus Son of Mary Academy in 2024 wherein he puts off his schooling for three years because of his busy work schedule.
In 2020, after Kadenang Ginto ended, the Gold Squad starred in Huwag Kang Mangamba with award-winning actresses, Eula Valdez and Sylvia Sanchez. They also starred in season 1 of Click, Like, Share, where Fedelin acted alongside Jimuel Pacquiao, the son of the former professional boxer, Manny Pacquiao, in the episode Trending.
In 2021, Fedelin, together with Andrea Brillantes, starred in an iQiyi series, Saying Goodbye with Kobie Brown, Andi Abaya and Nio Tria, the son of actress Cherry Pie Picache.
In 2022, he starred in Lyric and Beat with Andrea Brillantes, Darren Espanto, AC Bonifacio, Kyle Echarri, Angela Ken, Jeremy Glinoga and Sheena Belarmino. It was disclosed by Andrea Brillantes that she and Fedelin had maintained a private relationship spanning over two years. This is the last series of Fedelin and Brillantes after both of their loveteam and real life relationship ended.
In 2023, the pairing of Francine Diaz and Seth Fedelin were tested for the first time with their new drama series Dirty Linen by ABS-CBN and Dreamscape Entertainment in 2023. The loveteam called FranSeth were formed and both of them starred in the series called Fractured with Kaori Oinuma, Jeremiah Lisbo, Daniela Stranner, Raven Rigor, and Sean Tristan. The story is about a group of influencers who finds themselves trapped in a disappointing island resort.
In 2024, FranSeth debuted in the 50th Metro Manila Film Festival with their first-ever movie together, My Future You. The film received 10 nominations and won four awards, including Best Director, Best Editing, and 3rd Best picture, wherein Fedelin won the Breakthrough Performance in the Gabi Ng Parangal.
In 2025, Fedelin won the Best Actor award at 2025 Manila International Film Festival held at Los Angeles, California for the movie My Future You. He also starred in a series called Sins of the Father with Gerald Anderson, Shaina Magdayao, Jessy Mendiola, JC de Vera, RK Bagatsing, and Francine Diaz. He then starred at Shake, Rattle & Roll Evil Origins, an official entry to the 51st 2025 Metro Manila Film Festival, with Francine Diaz, Fyang Smith, JM Ibarra, Manilyn Reynes and many more.
| 2019–2020 | Kadenang Ginto | Michael "Mikoy" Sarmiento | Supporting Role | |
| 2020 | Arian | Main Role | ||
| 2020–2021 | Ang Probinsyano | Macoy | Supporting Role | |
| 2021 | Huwag Kang Mangamba | Pio Estopacio | Main Role | |
| Click, Like, Share: Trending | Cocoy | Main Role | ||
| Saying Goodbye | Ricky | Main Role | ||
| 2022 | Lyric and Beat | Beat | Main Role | |
| 2023 | Dirty Linen | Nicolas "Nico" M. Sinag | Main Role | |
| Oca | Main Role | |||
| 2025 | Lorenzo "Enzo" Rivera | Main Role |
| 2018–2019 | Housemate | |
| 2019 | Guest Housemate with Gold Squad | |
| 2019 - 2025 | ASAP Natin 'To | Guest |
| 2022 | Magandang Buhay | |
| 2023 | It's Showtime | |
| It's Your Lucky Day | Co-Host | |
| 2024 | Fast Talk with Boy Abunda | Guest |
| It's Showtime | ||
| TV Patrol | Celebrity Star Patroller | |
| TiktoClock | Guest | |
| 2025 | It's Showtime | |
| Rainbow Rumble | Contestant | |
| Houseguest | ||
| 2019 | VP Choice Awards | VP Spotlight of the Year | |||
| VP Choice Awards | Loveteam of the Year | Kadenang Ginto | |||
| Alta Media Icon Awards | Most Promising Male Star | ||||
| 33rd PMPC Star Awards for Television | Best New Male TV Personality | ||||
| 2020 | Edukcircle Awards | Outstanding Social Media Personality of the Year | |||
| VP Choice Awards | Loveteam of the Year | ||||
| 51st Box Office Entertainment Awards | Most Promising Loveteam for Television | Kadenang Ginto | |||
| Push Awards | Push Popular Love Team | ||||
| 2021 | VP Choice Awards | Loveteam of the Year | |||
| 34th PMPC Star Awards for Television | German Moreno Power Tandem of the Year (with Andrea Brillantes) | Kadenang Ginto | |||
| Best Single Performance by an Actor | Maalaala Mo Kaya Episode - Ilog | ||||
| 2023 | Gawad Parangal Awards - 12th KAKAMMPI OFW | Love Team of the Year (with Francine Diaz) | |||
| Anak TV Awards | Net Makabata Star 2023 | ||||
| 2024 | Perpetualites' Choice Awards | Best Young Male Media Personality | |||
| Anak TV Awards | Net Makabata Star 2024 | ||||
| Metro Manila Film Festival | Best Actor | My Future You | |||
| Breakthrough Performance | |||||
| 2025 | 2025 Manila International Film Festival | Best Actor | |||
| 37th PMPC Star Awards for Television | German Moreno Power Tandem of the Year (with Francine Diaz) | Dirty Linen | |||
| 27th Gawad Pasado | PinakaPASADOng Dangal ng Kabataan (with Francine Diaz) | ||||
| 41st PMPC Star Awards for Movies | Actor of The Year | My Future You | |||
| Loveteam of The Year (with Francine Diaz) | |||||
| 14th Kakammpi OFW Gawad Parangal | Best Loveteam of The Year (with Francine Diaz) | ||||
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