Stage and screen star JoBeth Williams will return for a multi-episode guest stint on ABC's hit drama Private Practice, according to TVGuide.com. She will once more play Bizzy, the mother of Dr. Addison Montgomery, played by series star Kate Walsh.

TVGuide.com is also reporting that actress Gaby Hoffman, who appeared in the Off-Broadway production of Third, will also guest-star this season as a girl who has been in and out of Oceanside Wellness Center for years with multiple pregnancies.

Williams has appeared on stage in The Night Is a Child, Quality of Life, and Body Awareness. Collins' credits include Monty Python's Spamalot, The Ritz, and Putting It Together.

The series also stars Audra McDonald, Taye Diggs, Amy Brenneman, and Tim Daly.