Louise Fletcher

Nurse Ratched is scrubbing into Private Practice!

Louise Fletcher, who played Jack Nicholson's stern caretaker in One Flew Over the Cuckoo's Nest, has been cast as Pete's mother, TVGuide.com has learned exclusively. She'll first appear in Episode 9.

Private Practice tackles rape during sweeps

The Oscar-winning actress recently appeared on Heroes as Peter's co-worker Dr. Coolidge.

Private Practice airs Thursdays at 10/9c on ABC.