[2] Miller co-writes with his life partner M. A. Fortin; the two wrote the screenplay for the 2015 horror comedy The Final Girls, and the USA Network drama series Queen of the South.
Miller also made guest appearances on several popular television shows, including 21 Jump Street, The Wonder Years, The Greatest American Hero, Highway to Heaven (for which he received a Young Artist Award in 1985), and Growing Pains.
He starred in the Los Angeles Ballet Company's production of The Nutcracker for three consecutive seasons beginning at age seven, and later appeared as a dancer in Janet Jackson's Grammy Award-winning Rhythm Nation 1814 video.
In 1997, he published a pseudo-autobiographical novel called The Mao Game about a fifteen-year-old child star attempting to cope with heroin addiction, memories of past sexual abuse, and the impending death of his grandmother, who has been diagnosed with cancer.
The two also co-wrote the screenplay and executive produced the 2015 horror comedy film The Final Girls, directed by Todd Strauss-Schulson and starring Taissa Farmiga and Malin Åkerman.