Colleen Miller's journey in the entertainment industry began when she was just 19 years old, while fishing in the California mountains. A resort photographer spotted her and recruited her to pose with a prize trout, which ultimately led to her being discovered by a movie scout. The scout was impressed by her appearance in print and offered her a small role in the 1952 film "The Las Vegas Story".
This initial exposure paved the way for her to land a more significant role in the 1953 film "Man Crazy", which caught the attention of Universal Studios and led to her signing a contract with the prestigious film studio. As a result, Colleen quickly became a prominent figure in the western and film-noir genres, appearing in a string of notable films including "Playgirl" (1954),"Four Guns to the Border" (1954),and "Man in the Shadow" (1957).
Colleen's performances in these films earned her critical acclaim for her natural talent and carefree sensuality. Her career reached its peak in the mid-1950s, with her playing the lead role in several films. However, she decided to retire from acting in 1958 to focus on her personal life and start a family with her husband.
Colleen remained married to her husband until their divorce in 1975. Following her divorce, she reportedly considered reviving her acting career but ultimately decided against it. Instead, she married Walter Ralphs, a prominent figure in the Ralphs Grocery chain, in 1976. The couple remained together until Walter's passing in 2010.