Kate Walsh arrives at a friend's house for a birthday party in Los Angeles on Monday (August 10).
The 41-year-old
Private Practice star who plays Dr. Addison Montgomery will have a familiar face join her in one of the episodes of the upcoming season. According to
Grey's Anatomy creator
Shonda Rhimes,
Chandra Wilson, who plays Dr. Miranda Bailey on
Grey's, will make an appearance on
Private Practice to