Sef Cadayona

John Paul Joseph Cadayona (born March 3, 1989), professionally known as Sef Cadayona, is a Filipino actor, host, comedian, and dancer. He is an alumnus of the fifth season of the Philippine reality talent show StarStruck.

Sef is called as the male Sheena Halili for portraying sidekick roles in various TV series. The series where he became a sidekick are Ilumina (2010) as the best friend of Aljur Abrenica, Time of My Life (2011) as the gay best friend of Kris Bernal, Alice Bungisngis and her Wonder Walis (2012) as the sidekick of Jean Garcia; in Together Forever as best friend of Julie Ann San Jose and in Mundo Mo'y Akin (2013) as the best friend of Alden Richards' role.

Aside from his sidekick roles, Sef also is getting attention because of his gay portrayals in several GMA Network shows.