John Paul Joseph Cadayona (born March 3, 1989), professionally known as Sef Cadayona, is a Filipino actor, comedian and dancer. He gained recognition after appearing in an ice cream commercial in the early 2000s. He later joined the fifth season of StarStruck V (2009), where he made it to the Final Fourteen and was noted for his dance skills. After the show, he appeared in several GMA Network programs, most notably in Bubble Gang, as host in Sabado Badoo, and as judge in Laff, Camera, Action. He took the lead role in .
In 2013, Cadayona appeared in the television sitcom series Vampire ang Daddy Ko as Stefano Bulaga / Stefani Ventura, followed by the drama Mundo Mo’y Akin and the science fiction drama Genesis. In 2015, Cadayona hosted the comedy anthology show Sabado Badoo and appeared in the sitcom series Juan Tamad as the title character. In 2016, he hosted the comedy game show Laff, Camera, Action!, followed in 2017 by his appearance in the romantic comedy drama Meant to Be as Bats Mendiola. In 2021, Cadayona starred in the prequel sitcom as the lead and title character Pepito Manaloto.
| Nanding | Episode: "Once Princess" | |
| Dave | Episode: "Edi Wow" | |
| Ilumina | Renato | |
| Time of My Life | Harry | |
| Together Forever | Jefferson "Jepoy" Teodoro | |
| Coffee Prince | Baldo | |
| Celebrity Bluff | Himself | |
| Rolly | Episode: "Habang Buhay Na Maghihintay" | |
| Genesis | Randy | |
| Sabado Badoo | Himself (host) | |
| My Faithful Husband | Jerome Dela Paz | |
| Juan Tamad | Juan | |
| Wagas | Danny | Episode: "Danny & Fredes Love Story" |
| A1 Ko Sa 'Yo | Enzo | |
| Laff, Camera, Action! | Himself (judge) | |
| Wish Ko Lang | Leevan | Episode: "Leevan" |
| The Stepdaughters | Bryce Morales | |
| Forever Young | Kapitan Gerry Peralta | |
| Just One Summer | Jason |
| Slumber Party | Jonel |
| Gayak | |
| Fish Vendor | |
| Kaleidoscope World | |
| 10th Golden Screen Awards for Movies | Breakthrough Performance by an Actor | Gayak | |
| 28th Star Awards for TV | Best Comedy Actor | ||
| 40th Metro Manila Film festival | Festival Best Supporting Actor | My Big Bossing's Adventure: Prinsesa | |
| 29th PMPC Star Awards for Television | Best Comedy Actor |
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