The drama, based on a Mexican format and developed by Desperate Housewives creator Marc Cherry, focuses on a group of four maids working in Beverly Hills.
Brown has now signed up to play a wealthy woman who employs one of the maids, Deadline says.
Brown recently played Lynne Reid in Homeland but is also known for her role as Lisa Niles in General Hospital. She has had guest appearances in shows such as CSI, Private Practice and Body of Proof.
The four lead roles in Devious Maids will be played by Ana Oritz, Roselyn Sanchez, Judy Reyes and Dania Ramirez.
Edy Ganem, Angelique Cabral and Rebecca Wisocky have also signed up for parts in the pilot.