Miller came to international attention as one of the so-called ‘NEA Four.’ Along with three other artists he won a Supreme Court action against the first Bush government after it had withdrawn their National Endowment for the Arts funding because of the supposedly controversial content of their artworks. Miller had used his 1990 funding to continue the typically homoerotic themes of his art which “explores the artistic, spiritual and political topography of his identity as a gay man.”

Since 1990, Miller has taught performance in the theatre department at UCLA and the dance program at Cal State LA. He co-founded two performance spaces, one in New York and the other in Santa Monica. His books are the autobiographical “Shirts and Skin” 1997 and an anthology of his plays “Body Blows” 2002.

His humourous and passionate performance pieces have been presented throughout North America, Europe, and Australia. His work has been performed in such prestigious venues as Yale Repertory Theatre, the Institute of Contemporary Art (London), the Walker Art Center (Minneapolis), and the Brooklyn Academy of Music. His stage performances include “Live Boys” 1981, “My Queer Body” 1992, and “Fruit Cocktail” 1996. Since the turn of the millennium, Miller has used his works “Glory Box” & "Us" to politicise the struggles faced by gay and lesbian Americans who are denied same-sex marriage and immigration rights for their non-American partners. Of "Glory Box," he says, “I want the piece to conjure for the audience a new glory box, a new kind of hope chest, that can be an alternative site for the placing of memories, hopes and dreams of gay people's extraordinary potential for love.” Miller’s “Glory Box” recounts the trials faced by the artist in trying to keep his Australian partner Alistair McCartney with him in America since the two met and became lovers in 1994. With McCartney denied the right to immigrate to America because Miller is of the same sex, the couple face having to move from their Los Angeles home to the United Kingdom or Australia where McCartney can sponsor Miller as his gay partner under more progressive immigration laws.