Mark Miller, a native of Houston, embarked on a journey to Hollywood after completing his studies at the prestigious American Academy of Dramatic Arts in New York. Upon graduating in 1952, he began his professional career by appearing in plays and made his debut in a Rhode Island production of The Philadelphia Story.
This marked the beginning of a long-standing friendship with renowned playwright William Inge, which led to Miller securing the lead role in Bus Stop and touring the United States and Canada alongside Joan Blondell in The Dark at the Top of the Stairs. The tour concluded its run at the iconic Biltmore Hotel in Los Angeles, where Miller was subsequently approached by Desi Arnaz and offered a starring role in Guestward Ho! (1960),a Desilu-produced sitcom, without the need for an audition.
Although the show was ultimately axed after a single season, it played a significant role in launching Miller's career as a sought-after TV leading man and supporting actor. He went on to appear as a guest star in numerous prime-time series, including Gunsmoke (1955),The Twilight Zone (1959),The Invaders (1967),I Dream of Jeannie (1965),The Name of the Game (1968),and The Streets of San Francisco (1972).
In addition to his acting career, Miller also ventured into writing TV scripts from 1966 and co-wrote the screenplay for the Keanu Reeves romantic comedy A Walk in the Clouds (1995). Furthermore, he authored the romantic comedy play Amorous Crossings in 2010, which starred Loretta Swit and had a four-week run at the Alhambra Theater in Jacksonville, Florida. The play received widespread acclaim, with a reviewer describing it as a "cleverly written, skillfully acted" nostalgic throwback to 1930s screwball comedies.
Miller was married twice, first to Beatrice Miller, a former costume designer, LA Times journalist, M-G-M publicist, and editor for Harper's Bazaar, with whom he had three daughters, all of whom are actresses or models: Penelope Ann Miller, Marisa Miller, and Savannah Miller. His second wife was the television actress Barbara Stanger.