The Day family is about to get one member larger as actress Linda Cardellini has been tapped to play Jess’ sister on New Girl.

TV Line broke the news today that Cardellini has been cast to play Abby, which will be a recurring role for New Girl season 3.

Abby is described as Jess’ wild-child sister. It’s not yet known how many episodes Cardellini will appear in or when her first appearance will be. We already know that Jess likes to butt in with her family’s problems (think Thanksgiving with her divorced parents), so it should be interesting to see how she interacts with a sibling.

You may know Cardellini from her roles on Mad Men, ER, Grandma’s Boy, or Freaks and Geeks.

Last month, it was also announced that Adam Brody would be making a guest appearance on New Girl. Brody will be appearing as Berkley, one of Jess’ ex-boyfriends, thought he’s now a married man and stay at home dad. But the two remain friends. The question is, how will Nick deal with a friendly ex-boyfriend in the picture?

Brody is most known for his role on The O.C.. He more recently appeared in Baggage Claim,Lovelace,Jennifer’s Body, or In the Land of Women.

Are you excited to see Cardellini and Brody appear on ‘New Girl’ when it returns?

Photo credit: NBC