Jess Day is an offbeat and adorable girl in her late 20s who, after a bad breakup, moves in with three single guys. Goofy, positive, vulnerable and honest to a fault, Jess has faith in people, even when she shouldn't. Although she's dorky and awkward, she's comfortable in her own skin. More prone to friendships with women, she's not used to hanging with the boys - especially at home.
Jessica Biel Cast On 'New Girl' Jessica Biel has been cast in a guest star role on New Girl. The actress will appear in the Fox comedy’s Season Four premiere as Kat, the hottest scientist in the world who ends up competing with Zooey Deschanel’s Jess over a cute guy. The setup of the September 16th opener is as follows: the gang challenges each other to see who can get lucky at the last wedding of the season. The guy Jess sets her sights is the same guy Kat is eyeing.