Katie Austin - Page 1 of 4

The six-time brand star and certified fitness trainer turns 33 today, Friday, Oct. 2.

The six-time brand star gave birth to her baby girl, Lila Reed, on Saturday, Sept. 5.

Get ready for our brand stars to strut the catwalk at the W South Beach on Saturday, May 30.

Katie Austin and the Cavinder twins are hosting a sold-out, live class in Fort Worth, Texas, tonight.

The models return for their sixth year with the brand, and were photographed for the magazine in Fort Myers, Fla.

Seven models were photographed in the Sunshine State for this year’s issue, including two new faces.

The five-time brand star is due at the end of the summer, she announced on Instagram.

Check out the gorgeous group of models who attended last night’s festivities in Las Vegas.

The brand staple never fails to turn heads, and her latest shoot was the perfect example.

These SI Swimsuit models got you covered for your next stunning look.

Austin flawlessly exhibited why bikinis are timeless items to stock up on in your wardrobe.

Follow along as SI Swimsuit models Katie Austin and Jena Sims lead this quick and efficient workout.

Our brand stars are sharing their go-to workout moves for a sculpted core.

SI Swimsuit models Katie Austin and Jena Sims demonstrate the quick and efficient moves here.

The brand stars demonstrate how to do bodyweight squats, alternating fire hydrants and more.

The five-time SI Swimsuit model is a Swiftie, so this dazzling look feels especially fitting to spotlight this month.

We’re spotlighting the birthday girl by highlighting her impressive five features with the brand.

The SI Swimsuit model and fitness trainer is entering a new chapter with her rebranded and fully revamped app.

Looking to match with these brand staples? Their suits are still available for purchase.

We’ve officially found our favorite version of this social media fad!