Jake Gyllenhaal 'learned so much' from working with military veterans

says he has learned much from working with veterans and experts over the course of his career, in which he has played a number of military-related roles.

Gyllenhaal, 42, chatted with the on Monday on the red carpet of at the Directors Guild Of America in Los Angeles.

The Oscar-nominated actor has past performed in a number of military-themed films such as 2005's Jarhead, 2009's Brothers and 2011's Source Code.

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