Casimero Bustamante "Roy" Padilla Sr. (Tagalog pronunciation: [paˈdilja]; March 4, 1926 – January 17, 1988) was a Filipino politician and actor who served as governor of the province of Camarines Norte from 1986 until his assassination in 1988 as a member of Corazon Aquino's UNIDO ticket.

Casimero Bustamante Padilla was born at the Mary Chiles hospital in Plaridel, Bulacan on March 4, 1926.

He was a delegate of Philippines to International Labour Organization of the United Nations in Geneva, Switzerland, representing Labor.

According to The Philippine Star, Padilla had children with numerous women that numbered up to 48,[6] including Ronaldo in 1962,[7] Royette in 1962,[8] Rommel in 1965, BB Gandanghari (formerly Rustom) in 1967, Rebecca in 1968,[6] Robin in 1969, and Rodolfo ("Gino") in 1974/1975.

Padilla was assassinated in Labo, Camarines Norte by a gunman while campaigning for governor on January 17, 1988, a day before the national elections, with his son Roy Jr. running in his stead.