LOS ANGELES — “Shedding for the Wedding,” which premieres today on CW, or “the CW” as it wants to be called but which always seems silly to write, combines the popular weight-loss competition reality genre with the popular planning-for-the-nuptials reality genre.

Although I don’t have the evidence at hand, surely these topics have met somewhere before, even if just for the space of an episode of “The Jenny Jones Show.”

You know the drill, or should by now. You might as easily, even more profitably, imagine the show as to watch it.

But for you who would rather not put in the work, here’s what you’ll get.

Nine seriously overweight couples compete for a dream wedding, picking up related odds and ends along the way — a gown, a cake, flowers. (You do not have to win the big prize, which you get for losing weight, to win the smaller ones, which you get for things like keeping your heart rate up.)

For narrative color, the couples — bunked together in the customary big house — are identified according to shared interests and the related theme they wish their wedding to take: “Team Eco-Lovers” would like some moss in their nuptials; “Team Greek Week,” who met at a frat party, want a beer pong table at their reception, “but we want it monogrammed, ‘cause that keeps it a little classy.”

The overqualified host is Sara Rue, from “Popular” and “Less Than Perfect” and also a former Jenny Craig spokeswoman.

Rue is too good for this job and, possibly as a result of that, not particularly good at it.

Even as these things go, “Shedding for the Wedding” is a plate-load of empty calories, a lot of huffing and puffing we’re meant to take as compelling even though there’s little compelling here.