Seth Yancy Fronda Fedelin (born July 9, 2002, in Dasmariñas, Cavite), is a Filipino actor, model, singer and dancer.

Fedelin first appeared on television as a housemate on the reality show Pinoy Big Brother: Otso (2018).

[2] Fedelin appeared in various soap operas after his stint in Pinoy Big Brother, such as Kadenang Ginto[3] and Huwag Kang Mangamba.

[4] The love team 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.

[5] In a media interview on their movie My Future You, and after 5 years of their love team, they declared they solely desire to be dubbed as "FranSeth" — not be the next KathNiel.