Rob McElhenney and Rob Rosell have scored a pilot production commitment at Fox for a new comedy series, Variety has learned.

The currently untitled project would follow an unconventional family in working class America. Both McElhenney and Rosell will write and executive produce. Nick Frenkel, Charlie Day, and Glenn Howerton will also executive produce. 20th Century Fox Television, where Rosell is currently under an overall deal, will produce.

Rosell and McElhenney previously worked together on the FX comedy “It’s Always Sunny in Philadelphia,” which McElhenney co-created and Rosell worked on as a writer and executive producer. Rosell also works as a writer on Fox’s “The Mick,” which stars “It’s Always Sunny” star and McElhenney’s wife Kaitlin Olson.

Rosell is repped by CAA. McElhenney is repped by WME and 3 Arts Entertainment.

This is the second comedy project set up by the “Sunny”/”Mick” team at Fox this season. Previously, Fox ordered a pilot for a retirement community comedy that was written by Day and Paul Fruchbom. Day will executive produce that project as well along with Frenkel, Howerton, and McElhenney. Kevin Abbott–whose past credits include producing and writing for “Last Man Standing,” “Reba,” and “Roseanne”– will executive produce and serve as showrunner.

(Pictured: Rob Rosell, left; Rob McElhenney, right)