Kate Bosworth feeling stronger than ever at 40

Kate Bosworth feels stronger and healthier at 40 than she did at 20.

The 40-year-old actress took to her Instagram on Wednesday to show off pictures of her working out with her health coach Steph Watson and reflected on her fitness journey.

"At 40, I have never felt better. I am super proud of my strength," Kate captioned the photo carousel, adding that she's "feeling more optimal now than I did 20 years ago running around in a bikini for Blue Crush".

The 2002 movie was a breakout role for the then 20-year-old, who starred as a surfer girl alongside Michelle Rodriguez, Sanoe Lake and Matthew Davis.

Sharing more details about her workout routine, Kate told her followers, "Steph creates a super simple plan for me that is custom to my body, my goals, and helps me establish sustainable, long term habits... Regardless of how busy I get with my chaotic schedule, she provides fun, short (but tough!) workouts to tone // sculpt in order for me to look and feel my best - no matter where I am in the world."

The actress also praised Steph for creating a "wholesome, healthy nutritional plan" that she can stick to while travelling.

The health coach returned the favour in the comments by writing, "I love working with someone so dedicated to their health and fitness... 5 years ago! WOW time flies. You’ve stayed consistent and dedicated to your health since the day I met you and it’s so admirable and inspiring."