The 90210 zip code is really filling up with new residents as casting is in full swing for the CW’s Beverly Hills, 90210 spin-off.

Former Arrested Development matriarch Jessica Walter has signed on to play Tabitha Mills. Tabitha is an aging Hollywood star whose alcohol issues are the reason that her son, Harry, and his family relocate from Kansas to Beverly Hills.

The Wire’s Tristan Wilds has been cast in the lead role of Dixon Mills. He’s the adopted son of the Mills family who’s bright but has his share of emotional baggage.

Jessica Stroup, previously seen on CW’s Reaper as the devil’s (maybe) daughter, has been cast as Silver. She’s the ambitious best friend of new girl Annie Mills (Shenae Grimes) and who is likely some relation to David Silver (Brian Austin Green) from the original series.

Michael Steger (The Winner) will portray Navid, a consummate student politician and the producer of West Beverly Hills High’s closed circuit newscast. Navid is of Persian decent, a Scientologist, and the best friend of Dixon.

On the faculty side, Ryan Eggold (Dirt) will play the cool and attractive English teacher. His unique teaching style annoys his fellow teachers but attracts the students, perhaps a bit too much.

There’s still no word if Jennie Garth will be joining Eggold on the faculty. Rob Thomas’ pilot script included Garth’s original series character, Kelly Taylor, working as a fashion teacher at the school. Still, Kelly’s former boyfriend says he’d be happy to return to his old stomping grounds.

Jason Priestley, Brandon Walsh from the old show, tells momlogic, “They haven’t contacted me about doing anything yet. But if it’s the right thing, I’m certainly open to it. I loved working on that show. I loved everything I did on that show. I had so many jobs on that show, I loved it so.” Stay tuned!