Walter Damián Montillo (Spanish pronunciation: [ˈwalteɾ monˈtiʝo]; born 14 April 1984) is an Argentine former footballer who played as an attacking midfielder.

Actuating at Universidad de Chile, after a poor beginning, he started becoming a notorious player, as well as one of the La U's most respectable ones, considered by the manager Sergio Markarián itself the one who usually commanded the moves in the team.

His hiring at the Celeste squad was announced on July 2 by US$3.5 million,[4] and he joined the club after Universidad de Chile finished playing the Copa Libertadores, which the team left in the semifinals.

[5] On 15 August, he made his debut against São Paulo FC, in a 2–2 away draw, making an assist to the 83rd-minute goal by Thiago Ribeiro.

In 2010's December 5, after Cruzeiro get the runner-up in the Brazilian League,[8] montillo was laureate with the Armando Nogueira Trophy as the best player in the competition.

[9] In the following day, he got Placar's Bola de Prata as one of the best midfielders of the League,[10] receiving it from the hands of Sorín — an oldschool idol in Cruzeiro.

Wondrously, the Celeste squad was eliminated at the round of, against Colombian Once Caldas, a fact that shocked supporters and the South America's media.

In the Brazilian league, after being criticized along the entire Cruzeiro squad, which began very poorly the championship, Montillo recovered its football with the arising of the manager Joel Santana.

Cruzeiro's president Gilvan Tavares increased the termination fine to €80 million, making Montillo the most expensive player in the South America.

He made his first full appearance for the national team against Venezuela in a World Cup qualification match on 22 March 2013.