The Rocky Fellers were a Filipino-American rock and roll band active during the 1960s. They were known for their pop-oriented and danceable style, featuring prominent vocal harmonies and catchy melodies. The band's most significant contribution to music history was their 1963 hit "Killer Joe," which reached number 16 on the Billboard Hot 100 chart. Notably, the band was comprised of four Mamaril brothers, with father Doroteo "Moro" Mamaril also contributing, making them one of the few family bands in the genre's history.