Mia St. John Bio
Mia St. John is an American-born model and professional boxer. She was born as Mia Rosales St. John on June 24, 1967 in San Francisco, California, United States. Her zodiac sign is cancer. She is also known as Mia Rosales or The Knockout.
In November 1999, Mia St. John brought her signature glamour and star appeal to Playboy.
Mia St. John has beautiful enhanced breasts, soulful brown eyes, and glossy black hair. With a voluptuous 34-26-33 frame, she's a true embodiment of Playboy allure.
Mia St. John entered professional boxing with a foundation already shaped by martial arts, discipline, and competition. Before stepping into the ring, she trained extensively in taekwondo and earned recognition as a champion in the sport. Boxing offered a new outlet for that athletic drive, and she made her professional debut during the 1990s, quickly becoming known for an aggressive style, marketable charisma, and willingness to remain active against a wide range of opponents.
Her career developed during a difficult period for women’s boxing, when female fighters were still struggling for television exposure, meaningful purses, and respect from traditional promoters. St. John became one of the division’s most visible personalities, eventually capturing the IBA and IFBA lightweight championships. In 2012, at the age of 45, she defeated Tiffany Junot to win the WBC super-welterweight title, fulfilling a championship ambition that had followed her through many years of victories, setbacks, and demanding bouts.
In November 1999, St. John appeared on the cover of Playboy in an eleven-page celebrity pictorial. The feature made her the first professional boxer to receive a Playboy cover, bringing together two sides of her public identity that commentators often treated as incompatible. She refused to accept that athletic credibility required her to hide her femininity, presenting the trained body of a fighter with the same confidence she carried into the ring.
St. John was married to actor Kristoff St. John, widely recognized for his long-running role on “The Young and the Restless.” Their marriage brought together two highly visible careers, and they had two children, Julian and Paris. Although the couple later divorced, their family remained deeply connected. After Julian died following years of mental-health struggles, Mia and Kristoff became advocates for improved psychiatric care and greater accountability within treatment facilities.
Following the deaths of both her son and former husband, St. John spoke candidly about grief, addiction, recovery, and mental health. She shared those experiences in her memoir “Fighting for My Life” and continued using her platform to support families facing similar struggles. Her legacy extends beyond championship belts or Playboy photographs. Mia St. John proved that a woman could be a martial artist, boxer, glamour figure, mother, and advocate without allowing any one role to erase the others.
