Ryan Murphy has found his newest Monster star, and she's the offspring of two Hollywood legends.

Ella Beatty has been cast as Lizzie Borden on Monster season 4. Beatty, the daughter and youngest child of Annette Bening and Warren Beatty, will play the role of the 19th-century accused (but acquitted) murderess on the fourth season of Ryan Murphy 's crime anthology series, Monsters.

Lizzie Borden is an infamous murderer whose story has become something of a nursery rhyme. And now, as part of Ryan Murphy's Monsters series, he's getting ready to tell her tale. Murphy and his frequent collaborator Ian Brennan are reportedly bringing on Kelli Marchman McNeely to write the series and it is going to be an interesting departure for Murphy and company who has worked with Netflix to tell the stories of Jeffery Dahmer with Dahmer,