Kayla Itsines

Kayla Itsines is an Australian personal trainer, fitness influencer, and entrepreneur who became one of the most influential figures in the global fitness industry through her Bikini Body Guide (BBG) workout programs and the Sweat fitness app. Born in Adelaide, South Australia, to parents of Greek descent, Itsines completed her Certificate III and IV in Fitness at the Australian Institute of Fitness. She began her career as a personal trainer at a women’s gym in Adelaide before building a massive following on social media by sharing client transformation photos.

Itsines and her then-partner Tobi Pearce co-founded the Sweat app (originally known as Sweat with Kayla) in 2015, which became one of the highest-grossing fitness apps in the world. The app featured her signature BBG workouts alongside programs from other trainers and grew to millions of subscribers worldwide. In 2021, Sweat was acquired by iFIT (now known as iFIT Health & Fitness) for a reported $400 million, making it one of the largest fitness technology deals in history. This acquisition was the primary driver behind Itsines’ substantial net worth.

Beyond the app, Kayla Itsines has authored several bestselling fitness guides, including “The Bikini Body 28-Day Healthy Eating and Lifestyle Guide” and “The Bikini Body Motivation and Habits Guide.” With over 16 million Instagram followers, she remains one of the most followed fitness professionals in the world. She has been named to Time magazine’s list of the most influential people on the internet and has received numerous awards for her contributions to the fitness industry. Itsines has continued to create fitness content and programs after the Sweat acquisition, maintaining her position as one of the top fitness influencers globally while focusing on empowering women through accessible workout programs.