American writer who is known for her bestselling young adult series, The Mortal Instruments. Her other book series include The Bane Chronicles and The Infernal Devices.
She was born in Iran to American parents and traveled widely throughout Europe before moving to Los Angeles in her teens. She honed her writing skills as an author of internet fan fiction based on the Lord of the Rings and Harry Potter series.
Her birth name was Judith Rumelt; Cassandra Clare became her pen name.
She married Joshua Lewis, and the couple settled in Amherst, Massachusetts. Both animal lovers, she and Lewis adopted three cats.
Screenwriter Doris Wishman was the cousin of Cassandra Clare's maternal grandfather, film producer Max Rosenberg.