Katie Millar (married name Millar-Wirig) is a former beauty pageant contestant who was Miss Utah in 2006 and a top ten finisher in Miss America 2007.
Millar-Wirig was born and raised in Utah. Her parents are Bret and Rita Millar. She graduated high school at age 17, and while attending Brigham Young University for a bachelor's degree in neuroscience, decided to compete in the Miss Utah competition for the opportunity to win a scholarship to support her education.
In 2006, Millar-Wirig was crowned Miss Utah, which included a $10,000 scholarship. The focus of her advocacy platform as Miss Utah was support for the Juvenile Diabetes Research Foundation, inspired by a sibling diagnosed with Type 1 diabetes during childhood.
As a result of her Miss Utah win, she then competed in the Miss America 2007 pageant. During the competition, she became a top ten finalist, which included a swimsuit and evening wear competition. Despite pressure from her designers and sponsors to compromise her core values, she wore a modest gown that she had altered, and a one-piece swimsuit during the competitions.
She appeared in a recurring supporting role on the drama television series Everwood and as herself in the reality TV movie Pageant School: Becoming Miss America.
Millar-Wirig married Brent Wirig in the Mount Timpanogos Utah Temple on July 14, 2007.