Taryn Manning is the third big name to join CBS' upcoming remake of Hawaii Five-O.
The actress - who recently appeared as herself on Melrose Place and enjoyed an extended run on Sons of Anarchy - has been cast as Mary Ann McGarrett.
This character is the younger sister of Steve McGarrett, the head of the show's Hawaii State Police, who will be played by Alex O'Loughlin.
Lost's Daniel Dae Kim has also signed on for the drama. It premieres this fall.