Gary Jules Aguirre Jr. (born March 19, 1969) is an American singer-songwriter, known primarily for his cover version of the Tears for Fears song "Mad World", which he recorded with his friend Michael Andrews for the film Donnie Darko.

[1] Jules recorded a cover of the song "Mad World" by Tears for Fears for the 2001 film Donnie Darko and released it as a single in December 2003.

The cover also featured as background music in various television programs such as drama General Hospital, as well as individual episodes of Without a Trace, The O.C., Smallville, Jericho, CSI: Crime Scene Investigation, House and Riverdale.

Electronic music producer Phutureprimitive remixed the Gary Jules version of "Mad World" and released it as an mp3 in 2011 with an accompanying video.

[citation needed] Jules was a surprise guest on a series of Parisian concerts of French singer Mylène Farmer, called Timeless 2013 (September 2013).

In all the performances that take place in the Palais omnisport de Bercy, Gary Jules sings his cover of Mad World joined by Mylène Farmer.