Flight of the Conchords plays a new song on "Late Show"

Flight of the Conchords, "New Zealand's most popular folk duo", is back. Members Jemaine Clement and Bret McKenzie appeared in the "Late Show" on Monday night to perform their new song "Father and Son" and to plead for a dinner with the Prime Minister of New Zealand. Jacinda Ardern.

Clement and McKenzie told Stephen Colbert that they've been busy since their HBO show in 2009, but that they're coming back to HBO with a special show in October. They also stated that they like to be in New Zealand because no one cares about their presence. In fact, they said the only people who are excited to see them in Wellington are the tourists.

Upon learning that Ardern will appear at the "Late Show" on Wednesday, McKenzie asked, "Why do not you ask her to ask us if we can come for dinner, maybe home?"

Colbert said, "Camera 3 – right here, just ask him."

McKenzie and Clement stared at the camera and McKenzie opened "Hi Jacinda."

Clement said, "We have an important question for you: can we come for dinner?"

The duo later played their new song, a dark duet on "a guy and his little guy" and a man named Trevor. Look at their performances below.

Mobile application users can watch the video here.

"Flight of the Conchords: Live in London" arrives October 6 at HBO.