"It very likely might not" return for a third season, Clement said.
"It could come back in a shorter season or like a special," he added.
"We've got to write the series, but we've also got to write the songs, and just dividing your time into those two writing tasks is really tricky," he said.
A HBO spokeperson left this statement
"We've left their future entirely in their hands," said Nancy Lesser, a spokeswoman for the network. "We would love to have more, and we left an open door at HBO."I'm Not Crying