Katy O’Brian Sets Fitness Book ‘Girl At The Gym’ At Simon & Schuster

EXCLUSIVE: The Mandalorian, Twisters and Mission: Impossible – Final Reckoning action star Katy O’Brian has written a book about the discipline that gets her into character, and that’s Girl at the Gym: A Beginner’s Guide to Strength Training and Becoming Your Most Badass Self.

O’Brian started martial arts at the age of five years old, and earned her brown belt in Shorei Goju Ryu karate at nine, and competed in figure for years before Hollywood found a use for any of it.

In Girl at the Gym, the actress puts two decades of training on the page, walking beginners through their first months under a bar and into intermediate programming, where O’Brian covers training through the menstrual cycle, pregnancy and menopause without losing hard-won progress, not to mention how to walk into a gym that wasn’t designed specifically for you in mind.

O’Brian recently wrapped Paramount’s A Quiet Place III. After starring on such series as Star Wars: The Mandalorian, Syfy’s Z Nation and the CW’s Black Lightning, O’Brian broke out opposite Kristen Stewart in A24’s Sundance premiere Love Lies Bleeding, playing Jackie, a drifting competitive bodybuilder whose road trip to Las Vegas curdles into violence, a performance built directly on her own years competing.

Since 2023, O’Brian starred in movies which grossed over $1.5 billion at the global box office including Twisters, Tom Cruise’s Mission: Impossible – The Final Reckoning, the Sydney Sweeney boxing pic Christy, Love Lies Bleeding, Paramount’s The Running Man and Disney/Marvel’s The Ant-Man and the Wasp: Quantumania.

O’Brian also appeared in Queens of the Dead and Maintenance Required. Her television credits also include Westworld, Black Agents of S.H.I.E.L.D., Halt and Catch Fire and The Walking Dead. O’Brian is an Indianapolis native and graduate of Indiana University Bloomington, O’Brian still teaches and trains martial arts. O’Brian is repped by Luber Roklin Entertainment, Gersh, RCM Talent and attorney Cary Dobkin.

The Simon & Schuster book is currently available to pre-order.