The creators of It's Always Sunny in Philadelphia are working on a new comedy series set on a spaceship.

Fox has ordered a pilot and five scripts of the new single-camera show from Rob McElhenney, Charlie Day and Glenn Howerton.

Called Boldly Going Nowhere, it is about day-to-day life onboard a ship led by a rogue captain.

McElhenney said: "All of us grew up watching Star Trek and other sci-fi series, and they're always about these adventures. We thought a great area to explore is what happens between the adventures, how the crew members take care of daily routine stuff on the spaceship."

The trio have also signed a deal with 20th Century Fox to develop other series, although McElhenney said that Sunny remained their first commitment.