Adrian Grenier Says Goodbye to Entourage and His Costar, Arnold

07/08/2011 at 02:45 PM EDT

Adrian Grenier Says Goodbye to Entourage and His Costar, Arnold
Courtesy Adrian Grenier
After eight seasons, HBO's Entourage has wrapped filming, and the show's stars have been getting emotional about the end.

Adrian Grenier has shared photos from his last days on set, including a shot with his canine costar, Rocky, who played the Entourage crew's beloved Rottweiler, Arnold.

"Saying my goodbyes to 'Arnold' (Rocky) and thanking him for 8 great years of loyal service!" he wrote on Facebook.

"I think he knows Entourage is coming to an end – dogs always know," Grenier added. "(And I kinda look like a dog in this too. Ruff Ruff.)"

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