Entertainment Weekly announced today that Orange Is The New Black star Elizabeth Rodriquez will be joining the cast of The Walking Dead spinoff Fear The Walking Dead. Reportedly, Rodriquez has been cast in a “mystery role” that executives are keeping hush-hush. The only known information is that the character will be a series regular, but will not be featured in the pilot episode since the casting announcement comes post-filming.

Rodriquez is most recently known for her role as inmate Aleida Diaz on the Netflix original series Orange Is The New Black. She also had a short stint of the series Grimm.

Fear The Walking Dead is said to be premiering in late summer 2015. The pilot episode is based in Los Angeles, and it has yet to be determined whether the series will move on from that location. Fear The Walking Dead will be set at the initial outbreak of the apocalypse, but will not delve into the origin of the zombie virus. The Walking Dead spinoff has already been green lighted for two seasons – a six episode season in 2015, with a second season set to air in 2016.

Rodriquez joins previously cast Cliff Curtis, Kim Dickens, Frank Dillane, and Alycia Debnam Carey.