Bret and Jemaine's guest turn

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FLIGHT OF THE FINGERS: In the show, the Conchords are portrayed with The Simpsons standard number of digits: four on each hand.

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As the evil Mr Burns would say: Excellent ...

The creators of The Simpsons have finally revealed what Wellington duo Flight of the Conchords will look like when they guest star in the long-running show in the United States this month.

The cartoon of Jemaine Clement and Bret McKenzie, signed by Simpson's creator Matt Groening, is a Simpsons-style makeover that includes yellow skin and one fewer finger on each hand.

The pair guest star in the first episode of the new season, Elementary School Musical, to be broadcast in the US on September 26.

In it, Lisa enrols at a special band camp where she runs into talented singers, including Lea Michele, Corey Monteith, and Amber Riley from television show Glee. Flight of the Conchords play two free-spirited, artsy camp counsellors.

A TV3 spokeswoman said the episode would probably air in New Zealand next year.

The Dominion Post first revealed in April that Clement and McKenzie would voice their Flight of the Conchords characters in the show. It is understood Clement and McKenzie rehearsed lines with Nancy Cartwright, the voice of Bart Simpson, over the phone from Wellington before recording in America.

Clement will also soon voice another animated character  a tiny yellow "minion"  in the feature Despicable Me, which opens in New Zealand on September 16.

- © Fairfax NZ News