By Dan Snierson
December 12, 2013 at 10:15 PM EST
F. Scott Schafer/Netflix; Chris Haston/NBC

There’s going to be an interesting Development on Sean Saves the World: Portia de Rossi has signed on to guest-star in three episodes of Sean Hayes’ NBC comedy, EW has learned. The Arrested Development star will play Sean’s smart, high-powered ex-wife who re-enters his life.

Her episodes will likely air in early spring. Upcoming installments will also feature fellow Will & Grace alum Megan Mullally as Sean’s sister and Guy Pearce as his love interest.

The final episode of Sean before the holidays airs Thursday night at 9 p.m.