The drama was widely expected to finish in 2011 and TV Guide reports that HBO's programming president Michael Lombardo has now confirmed the rumours.
"The plan right now is we'll finish up this season," he said. "We'll do a shorter order for next season - we've talked about six [episodes]."
Lombardo also confirmed that an Entourage movie could be made in the future.
"[Creator Doug Ellin] wants to write a film, but wants to do it if it makes sense for the story," he said. "I will expect that within the next couple years [he'll have another show on HBO]. But next summer will definitely be the final season of Entourage."
The current season of Entourage continues on Sundays at 10.30pm on HBO.