Justin Chatwin
Justin Chatwin from Shameless is also in the film, but i think his role is just a cameo. There's a behind the scenes photo with him, Dax Shepard and Vincent D'Onofrio
https://www.facebook.com/reelblogfansite/photos/a.682551328447981.1073741827.640369395999508/944832885553156/?type=3&theater
Can't wait !