Private Practice
Guest Stars

Rosanna Arquette will guest star on Private Practice, according to TV Guide.

The 50-year-old, who appeared on another Shonda Rhimes-produced program, Grey's Anatomy, as an inmate who some fans may remember jeopardizing her health to evade solitary confinement, will be playing the bohemian mother of Dink (Stephen Lunsford).

Oh yes, Dink is coming back. We met him on last week's double episode as Maya's new boyfriend. Maya is the daughter of Sam (Taye Diggs) and Naomi (Audra McDonald).

Arquette, who recently guest-starred on two episodes of ABC's Eastwick, is scheduled to appear in one episode of Private Practice in early February. Can't wait to see her!

Sadly, we'll be waiting awhile to see anyone at Oceanside Wellness (or Pacific Wellcare) The show is off until January 14, when it returns with Grey's in a two-hour crossover.

Rosanna Arquette is coming to Private Practice.

Gilmore Girls, rejoice!

Melissa McCarthy, who played Sookie on that CW cult smash, will guest star on a January episode of Private Practice.

Insiders have told Entertainment Weekly that McCarthy’s character will be pregnant and a patient of Dell's.

Since her long-running stint on Gilmore Girls, McCarthy has appeared on a few episodes of Samantha Who? and takes on a supporting role in the Katherine Heigl/Josh Duhamel comedy, Life as We Know It.

As a veteran of the soap opera world, Leven Rambin knows all about backstabbing and bed-hopping.

With that in mind, Lexie Grey better watch her back. Or her man, to be specific: the former All My Children star has booked a recurring role on Grey's Anatomy.

According to Rambin's Twitter account, the actress has started filming scenes for the ABC hit already; and her character looks to be going after a certain, gorgeous plastic surgeon:

Soap Opera Weekly, meanwhile, reports that Rambin will actually recur on both Grey's Anatomy and Private Practice.

No details yet on her character, but expect her to show up later this year. And cause a few problems for Lexie and Mark, by the implication of this Tweet.

Ready to meet Addison's family, Private Practice viewers?

As previously reported, the ABC drama is set to delve deeply into this doctor's home life, as Barry Bostwick has already been cast as her father.

Now, we can confirm that JoBeth Williams has landed the role of the Montgomery matriarch, Forbes.

The actress will appear in this season’s 10th episode. The former Oscar nominee was most recently seen on TV in four 2007 episodes of Dexter.

Last season, Private Practice viewers watched as Addison's brother Archer suffered through a life-threatening disease.

It like like this was just an initial look into the Montgomery family, as a series rep tells People that fans will soon learn a lot more about her privileged background.

In a November episode aptly titled "Sins of the Father," Barry Bostwick will guest star as The Captain, as Addison's dad drops in to Oceanside Wellness Center.

Daughter and father “have bad blood between them,” the show insider said. “It’s a tense relationship.”

Bostwick is best known for his former role as the Mayor on Spin City. In 2009, he appeared on Nip/Tuck, Ghost Whisperer and Supernatural.

UPDATE: This role has been changed. Stephen Collins will now portray Addison's father.