Born on February 12, 1989, in Indianapolis, Indiana, Katy M. O'Brian is an American actress and martial artist. O'Brian began studying martial arts at the age of 5. Throughout her youth, she participated in numerous sports programs and music programs as a percussionist. O'Brian attended Indiana University Bloomington, majoring in psychology and Germanic studies. She received law enforcement certification through the university's Cadet Officer Program. After graduating, she became a police officer for seven years at the Carmel Police Department in Carmel, Indiana. She obtained her personal trainer certification and began competing in bodybuilding figure competitions.
In 2016, O'Brian moved to Los Angeles to pursue a career in film and television. O'Brian's first television role was as a Savior named Katy on AMC's "The Walking Dead" (2010 - 22) followed by roles on "Halt and Catch Fire" (2014 - 17) and "How to Get Away with Murder" (2014 - 20). In 2018, O'Brian booked her first regular role on the comedy action series "Z Nation" (2014 - 18). In 2020, O'Brian starred in Seasons 2 and 3 of the "Star Wars" series "The Mandalorian." In 2022, it was announced that Katy O'Brian would star in "Love Lies Bleeding" (2024).