Cooper's first feature film was Wet Hot American Summer and then he appeared in Carnival Knowledge and My Little Eye and Wedding Crashers.
On television, Cooper appeared in the first three seasons of Alias as Will. He also appeared in Kitchen Confidential as Jack, and as Tom in Jack & Bobby. He also appeared with a recurring role in Touching Evil playing OSC Agent Mark Rivers, and in The Street playing Clay Hammond. In addition, Cooper has made guest appearances on shows such as Law & Order: Special Victims Unit, Law & Order: Trial by Jury, Mismatch, and Sex and the City.
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