Mark Seth Yancy Fronda Fedelin (born July 9, 2002, in Dasmariñas, Cavite) also known as Sethyboy 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). He has since appeared in various films and television series, such as Kadenang Ginto (2019) and Huwag Kang Mangamba (2021). He also starred in the iWantTFC film Wild Little Love (2019) Life and career Early life Fedelin was born on July 9, 2002, in Dasmariñas, Cavite to a Filipino-American mother, and a Filipino father. He is the eldest son among his siblings. He studied at Dasmariñas Integrated High School. Pinoy Big Brother In 2018, Fedelin participated in the first batch of Pinoy Big Brother: Otso as a housemate, where he was evicted in the last eviction of that batch. Acting career Fedelin appeared in various soap operas after his stint in Pinoy Big Brother, such as Kadenang Ginto and Huwag Kang Mangamba. The love team pairing of Francine Diaz and Seth Fedelin will be tested for the first time with their new drama series Dirty Linen by ABS-CBN and Dreamscape Entertainment this coming 2023. Discography Kahit Na Anong Sabihin Ng Iba (The Gold Squad EP, 2019, Star Music) Mamahalin Kita Palagi Lagi (2019, Star Music) Liligawan Na Kita (New Views, 2021, Star Music) Kundi Ikaw ( his new single in 2022, Star Music) Muli (2022, Ace Banzuelo) Filmography Film Television / Digital Awards and nominations See also Pinoy Big Brother: Otso References External links 2002 births Living people ABS-CBN personalities Filipino male film actors Filipino male television actors Male actors from Cavite People from Dasmariñas Pinoy Big Brother contestants Star Magic Filipino people of American descent