Marvic Leonen

Marvic Leonen
Leonen in December 2022
33rd Senior Associate Justice of the Supreme Court of the Philippines
Assumed office
May 14, 2022
Preceded byEstela Perlas-Bernabe
Associate Justice of the Supreme Court of the Philippines
Assumed office
November 21, 2012
Appointed byBenigno Aquino III
Preceded byMaria Lourdes Sereno
Chief Peace Negotiator for the Republic of the Philippines
In office
July 2010  November 2012
Appointed byBenigno Aquino III
Succeeded byMiriam Coronel-Ferrer
13th Dean of the University of the Philippines College of Law
In office
2008–2011
Preceded bySalvador T. Carlota
Succeeded byDanilo Concepcion
Personal details
Born (1962-12-29) December 29, 1962
Baguio, Philippines
CitizenshipFilipino
Children1
Alma materUniversity of the Philippines Diliman (BA, LLB)
Columbia University (LLM)
NicknameLabGuru

Mario Victor "Marvic" Famorca Leonen (born December 29, 1962) is a Filipino jurist who has served as an associate Justice of the Supreme Court of the Philippines since 2012. President Benigno Aquino III appointed Leonen to the position at the age of 49, making him the second-youngest jurist in the court's history. Following the retirement of Estela Perlas-Bernabe in 2022, he has been the senior associate justice of the court.

Before joining the Supreme Court, he served as the chief peace negotiator for the Republic of the Philippines in peace talks with the Moro Islamic Liberation Front. Leonen is sometimes referred to as "The Great Dissenter" for his liberal and human rights-oriented decisions, which often contrast with those of more conservative justices aligned with Rodrigo Duterte.

Leonen has served as dean of the University of the Philippines College of Law from 2008 to 2011. He is known for his work in environmental activism and community organizing.