HBO officially announced during their TCA panel that Entourage will come to an end next summer. HBO says they will order a shortened final season, perhaps as few as six episodes, bringing the show to a close in 2011 after eight seasons on the air.
“The plan right now is we’ll finish up this season, we’ll do a shorter order for next season, we’ve talked about six,” said Michael Lombardo, HBO programming president.
Lombardo also added that the series could continue with a film:
“[Creator Doug Ellin] is appropriately reserving — he wants to write a film, but wants to do it when the story will make sense. He’s pitched other shows to us. I will expect that within the next couple years [he’ll have another show on HBO]. But ‘Entourage’ next summer will definitely be the final season.”
Source: the live feed