Melissa Leo, fresh off an Oscar nomination for her performance in Frozen River, has joined the cast of Treme, the HBO pilot from The Wire‘s David Simon. She’ll play a civil rights lawyer in the ensemble drama, which tells the story of post-Katrina New Orleans through the eyes of local musicians, Variety says. As previously reported, the cast will also feature Steve Zahn, Wire vets Clarke Peters and Wendell Pierce, Deadwood‘s Kim Dickens, and CSI: Miami‘s Khandi Alexander.