Ammie Masterson was born Ammie Nicole Masterson in Los Angeles, California, to Coleen Lillie (Fairman) and Reno Leroy Masterson, a business owner. Her first performance on stage was a dancer when she was 6 years old. She joined the United States Air Force out of high school. During her enlistment, she was stationed in Northern Japan, where she joined the Base Theater Guild, Co-hosted a weekly Hip-Hop radio show, and performed in several PSA's for the base hospital where she worked. After returning to the United States, and finishing her enlistment, Ammie moved to Georgia, where she was able to pursue her career as a working actor. She met and signed with her first agent in Atlanta, GA. After moving to Texas, Ammie had her television debut as an EMT on the reboot series "Dallas" in 2013. Since then, Ammie has had several principal roles on on network television, and most recently she has taken on the iconic role as Josie "Mac" MacReynolds on the reboot of "Magnum P.I." Ammie can also be seen in several films such as the award winning features "Thunder Roard" and "Greener Grass", as well as Robert Rodriguez's "We Can Be Heroes", "#RIP", "Melville", and "The Doo-Dah Man". Ammie continues to work, and train in her craft.