Raphael John "Ralph" Gil Eigenmann (25 September 1961 – 1 September 2014), better known by his screen name as Mark Gil, was a Filipino actor.
Gil was often cast as a main villain to Bong Revilla, Jr, Ronnie Ricketts, Robin Padilla, Lito Lapid, Phillip Salvador, Rudy Fernandez, Jestoni Alarcon, Ace Vergel, Cesar Montano, John Regala, Ian Veneracion, to name a few.
He was best known for playing the role of Lorna Tolentino's former American boss-lover-killer in the drama-suspense thriller The Elsa Castillo Story: The Chop-Chop Lady, the script of which is inspired by true events.
He also appeared in several drama series, the last of which was the ABS-CBN drama The Legal Wife, starring Angel Locsin.