IT COULD END HERE: Jemaine Clement says there may not be a third season of Flight of the Conchords.

Flight of the Conchords star Jemaine Clement says his offbeat HBO comedy series may not continue for a third season because it requires so much work, but a final decision will be made within a month.

Clement said he needed to discuss the future of the show with his co-star, Bret McKenzie, and with the director of the series, James Bobin.

"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.

The largely autobiographical Flight of the Conchords, an offbeat, cult favorite in the United States, tells of two New Zealand bandmates named Jemaine and Bret who move to New York to try to make it in the music business.

The show began in 2007 and is based on Clement and McKenzie's folk parody band Flight of the Conchords. The second season ended earlier this year on the US network HBO, and has just finished screening in New Zealand.

This year, the show gained an Emmy nomination for best comedy series, but lost to 30 Rock on NBC. Clement was also nominated for best lead actor in a comedy series.

Clement, who took flight on a solo career last week starring in a new movie Gentleman Broncos, said he and McKenzie were challenged to keep up with the work required for the show.

"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.

Clement, who also said in January that season two could be the last for Flight of the Conchords, said its end would be "bittersweet" because "it's so hard" to produce.

Flight of the Conchords averaged 3.1 million viewers per episode last season, in-line with season one, HBO said.

"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."

Last year, Clement and McKenzie's musical duo Flight of the Conchords won New Zealand's first Grammy since 1984, for their EP The Distant Future. They won for best comedy album.

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