Best friends Lizzy (gay and a bit type-A) and Luke (straight and more laid back) are like family. When they were kids and both of their parents were getting divorces, Lizzy (Elisha Cuthbert, "Happy Endings") and Luke (Nick Zano, "2 Broke Girls") stuck together, and they've been there for each other ever since. Now, all grown up and still single, they've decided to start a family of their own. No, not like that (there are some lines even they won't cross), we're talking the non-romantic, go-to-the-doctor's-office type of baby-making.
Then one night, after yet another failed attempt at conception, the two head out to a bar to let off some steam. That's where Luke meets Prudence (Kelly Brook, "Smallville"), a free-spirited British girl who's slated to go back to England in a matter of days. Lizzy isn't a huge fan — it might have something to do with Prudence waltzing around their apartment naked — but Luke really hits it off with her. Soon they're spending every last minute of her limited time together. Then, just as Lizzy discovers that she's actually pregnant, Luke announces that he and Prudence got married and a different kind of family is born.
The cast also includes Brandon Mychal Smith ("Get On Up,"), Rebecca Corry ("2 Broke Girls") and Chris Williams ("Satisfaction").
NBC's "One Big Happy" is a production of Warner Bros. Television and A Very Good Production. Writer Liz Feldman ("2 Broke Girls") and director Scott Ellis ("2 Broke Girls") serve as executive producers with Ellen DeGeneres ("The Ellen DeGeneres Show") and Jeff Kleeman ("The Change Up").