[1][2] As a child, Miller spent five years as a patient of Texas Scottish Rite Hospital for Children, an organization he also supported.

[4] After graduating from college, Miller moved out to Los Angeles where he began working in the mail room of Industry Entertainment.

A year later, he landed the role of Richie Novak, the murdering and blackmailing brother of Annie Lavery on All My Children, a soap opera on ABC.

Barbara Bloom (Senior Vice President, Daytime, CBS Entertainment), Julie Hanan Carruthers (Executive Producer, All My Children), Marla Kanelos (former script writer, All My Children, now Associate Head Writer, The Young and the Restless) and, screen-test partners Peter Bergman and Elizabeth Hendrickson, were instrumental in his casting at The Young and the Restless,[11] where he was cast in the role of Billy Abbott.

[citation needed] In August 2012, it was announced Miller would be appearing in primetime as a recurring cast member on The CW's Ringer.

[17] On September 2, 2014, General Hospital executive producer Frank Valentini announced on Twitter that Miller would join the cast as Jason Morgan.

"[30][31]The final autopsy report, conducted in November 2023 and released in the following month, concluded that Miller's death was a suicide resulting from "gunshot wound of head".