Amanda Milius’s father, John Milius, is an American screenwriter, producer, and director. He wrote the first two Dirty Harry movies and worked as the co-creator of the HBO series Rome.
John and his second wife, Celia Kaye, got married on February 26, 1978, and had one daughter, Amanda. The couple divorced, after which he got married to actress Elan Oberon in 1992.