Will Arnett is keeping very busy. In addition to starring on NBC's 'Up All Night' and the newly announced 'Arrested Development' revival, TVLine reports Arnett will return to '30 Rock.'

No date for Arnett's return to the series has been given, but '30 Rock' has just begun production on Season 6. It's currently slated for a midseason debut.

To date, Arnett has been nominated for three Emmys for his role as Jack's (Alec Baldwin) nemesis Devin Banks.

In other casting news ...

Bravo says nobody is fired from 'Real Housewives of New Jersey.' The network says all five cast members will be featured in Season 4 of the hit reality series. However, they didn't say anything about how long they'll be "featured" or if anybody quit ... [EW]

Cheryl Ladd will guest star on 'Chuck.' The 'Charlie's Angels' veteran will play Sarah's mom. Look for Ladd to show up in January. [EW]

'Deadwood' actor Brad Dourif is guest starring on 'Once Upon a Time.' He'll play a beggar Rumpelstiltskin befriends. [TV Guide]

Broadway actors Savannah Wise and Wesley Taylor will guest star on NBC's 'Smash.' Wise and Taylor will play dancers who befriend Katharine McPhee's character. [Broadway.com]