In 2006, Cohen appeared as Tad Becker in five episodes of the American soap opera As the World Turns. He appeared alongside Uma Thurman and Evan Rachel Wood in the 2007 thriller The Life Before Her Eyes. In 2008, he made his leading film debut as Timothy in Were the World Mine, an independent musical film, based on A Midsummer Night's Dream. He also contributed to the Soundtrack. He had taken voice lessons for a year.
Cohen is Jewish. He graduated from UCLA in 2009, and is openly gay. His brother, David Oliver Cohen, is a television actor.
In 2010, he recorded and posted a video in connection with the It Gets Better Project and The Trevor Project.
In 2013, Cohen appeared in his second movie Getting Go: The Go Doc Project taking the role of a shy college grad who devises to shoot a documentary about the New York City nightlife scene to meet the go-go guy Matthew Camp he's obsessed with.
