Anne Dudek joins USA's 'Affairs'

To co-star on the pilot opposite Piper Perabo

"House" alumna Anne Dudek has been taped to co-star opposite Piper Perabo on USA Network's pilot "Covert Affairs."

"Affairs" centers on Annie Walker (Perabo), a multilingual CIA trainee who joins the agency while still reeling from a mysterious ex-boyfriend who appears to be of particular interest to her bosses.

Dudek will play her sister. She joins recently cast Christopher Gorham.

Dudek is perhaps best known for her role as Dr. Amber Volakis a k a Cutthroat Bitch on Fox's "House." She's also had recurring roles on HBO's "Big Love" and AMC's "Mad Men."