Series creator Doug Ellin confirmed earlier in the year that a movie adaptation is in the works.
Dillon told TV Guide: "I think it's still going to happen. It's just kind of tricky with the guys working, but it seems like all the actors are on board."
The actor, who played Johnny 'Drama' Chase on the HBO series, added: "Doug Ellin wants to write it. Mark Wahlberg wants to produce it so I do think it probably will happen. I hope it does."
Executive producer Wahlberg recently expressed his desire for an Entourage film, noting that the show's recent series finale leaves everything "teed up for a movie".
Dillon currently stars in new CBS sitcom How to Be a Gentleman, which continues tonight at 8.30/7.30c.
> Entourage: 'The End' recap
Watch the cast of Entourage discuss the show below: