Life Unexpected and The Secret Circle star Britt Robertson has been cast in a drama series for the CW sister network CBS. Robertson has joined Under The Dome, CBS’ 13-episode summer series from Steven Spielberg and Stephen King. Based on King’s bestselling novel, Under The Dome is set in Chester’s Mill, a small New England town suddenly and inexplicably sealed off from the rest of the world by an enormous transparent dome. The town’s inhabitants must deal with surviving the post-apocalyptic conditions while searching for answers to what this barrier is, where it came from and if and when it will go away. Robertson will play Angie, an attractive young waitress and aspiring nurse who’s always dreamed of escaping the town of Chester’s Mill.