New '90210' showrunners Patti Carr and Lara Olsen have made the first of their promised casting changes for Season 4 of the CW drama: fan favorite Trevor Donovan, who plays out gay teen Teddy Montgomery, is not coming back as a series regular next season.

According to TV Line, the 32-year-old actor is taking the Andrea Zuckerman route and will appear in "roughly five episodes" as a guest star in the fall.

"I look back on getting this real-life story line as a blessing," Donovan said in a statement to TV Line. "To be able to simultaneously take on a challenging role and bring awareness to a relevant social issue was a win-win for me. I'm looking forward to what opportunities and adventures lie ahead."

Looks like our "Teenage Dream" is becoming a reality: Darren Criss is in talks to join 'Glee' as a series regular.

According to Deadline Hollywood, Criss was first cast on a recurring basis, but after last night's gay bullying episode, he may be sticking around full-time.

If all goes according to plan, look for Criss' Blaine to be a series regular at the start of season 3.

In other casting news ...

• Malcolm-Jamal Warner will guest star on 'Community.' The 'Cosby Show' veteran will play Shirley's ex-husband. [Entertainment Weekly]

• Trevor Donovan will guest star on 'CSI.' The '90210' star will show up as a casino actor who claims to have been mugged. Carrot Top will appear in the episode as himself. [Zap2It]

• Bonnie Franklin has been tapped to guest star on TV Land's 'Hot in Cleveland.' Franklin, who costarred alongside Valerie Bertinelli on 'One Day at a Time,' will also be joined in season 2 by Melanie Griffith, Wayne Knight, Illeana Douglas, John Schneider, Jack Wagner and David Starzyk. [Entertainment Weekly]

Those rumors about one of the male characters on The CW's '90210' coming out this season? All true, as it turns out, and -- SPOILER WARNING -- if you don't want to know who it is, stop reading now.

Here's some good news for you '90210' fans: Trevor Donovan isn't about to give up his Beverly Hills address anytime soon. The actor, who plays surfing tennis champ Teddy Montgomery on the show, has been promoted to a series regular, according to the Los Angeles Times.

Donovan's promotion comes on the heels of co-star Gillian Zinser, who plays newbie Ivy Sullivan, also getting a series regular bump, and the announcement that The CW will pair the show's third season with 'Gossip Girl' on Monday nights.

What's in store for our favorite over-privileged California kids as they head into their senior year at West Beverly? According to the network's description for season three, released at the CW's recent upfront presentation, we're in for a year full of break-ups and make-ups, family drama, raging hormones and, of course, plenty of scandal.

Isn't it comforting know that some things never change?