Walter Damian Montillo is an Argentinean association footballer who currently plays as midfielder for Cruzeiro at the Brazilian Serie A.

He played for Argentina U-20 in the 2003 FIFA World Youth Championship in United Arab Emirates. He played in most of the team's games. Recently, he was called by Alejandro Sabella to play the second match of the mini-tournament "Superclássico das Américas" against Brazil, where only players who were playing in South America could be called, woring the number 7. Although the loss by 2-0, Montillo was very praised by the Argentinean media.But since then he has't been called again to represent Argentina nationally, fact that is a grievance specially for many Cruzeiro supporters.