Adrian Grenier Vincent Chase Actor Kevin Connolly Eric Murphy Actor Kevin Dillon Johnny "Drama" Chase Actor Jerry Ferrara Turtle Actor Jeremy Piven Ari Gold Actor Debi Mazar Shauna Guest Star Rex Lee Lloyd Guest Star Lauren London Kelly Guest Star Marlon Young Rufus Guest Star Deborah Lacey Guest Star Assaf Cohen Yair Marx Guest Star Branka Katić Nika Marx Guest Star Branden Williams Guest Star Jimmy Shubert Guest Star Steven Montfort James 'JJ' Guest Star Jonathan Sadowski Brett's Assistant Guest Star Brett Ratner Brett Ratner Guest Star J. Claude Deering Brett's Assistant Guest Star Daniel Samonas Tommy Guest Star Ryan Eggold Castmate Guest Star Marisa Miller Model Guest Star Helen Tucker Hot Girl Guest Star Erica Walker Massage Therapist Guest Star Aaron Brown Twin Guest Star Christopher Brown Twin Guest Star Mark Wahlberg Executive Producer Stephen Levinson Executive Producer Doug Ellin Executive Producer Larry Charles Executive Producer