Ross Butler plays Zach Demsey on 13 Reasons Why- Instagram handle This image appears in the gallery:13 Reasons Why Cast Instagram Handles From Dylan Minnette To Brandon Flynn 7. Ross Butler plays Zach Demsey on 13 Reasons Why- Instagram handle Instagram handle: @rossbutler Followers: 8.2 million 11 images See the full gallery: 13 Reasons Why Cast Instagram Handles From Dylan Minnette To Brandon Flynn