Who's that girl? It's Jess' sister!
Cardellini will take on the recurring role of Abby, Jess' wild-child sibling, and will begin filming on the hit Fox sitcom this week. The actress, who is also known for her work on Freaks and Geeks and ER in addition to her Emmy-nominated turn as Don's (Jon Hamm) neighbor-turned-mistress on Mad Men, will first appear in February.
Abby isn't the first family member of Jess' viewers have met: Rob Reiner and Jamie Lee Curtis have appeared as her divorced parents, Bob and Joan.
We recently reported that music icon Prince is set to guest star in New Girl's Super Bowl episode, and sources tell us he will interfere with the show's main couple Nick and Jess. Also stopping by the loft to hang out with the gang is The O.C.'s Adam Brody, who will play an ex-boyfriend of Jess'. (Yes, we're still squealing over that casting.)
New Girl airs Tuesdays at 9 p.m. on Fox.