Kevin Costner is embarking on an exciting new chapter in his fitness journey, and he’s finding motivation in an unexpected source—none other than Jennifer Lopez. 

After ringing in the New Year in Aspen with the global superstar and other friends, 

the 70-year-old *Yellowstone* star has become more determined than ever to transform his body and get in top shape. 

A source close to Costner revealed to *In Touch* that J.Lo’s age-defying physique has played a significant role in his decision to focus on his fitness.

“Kevin keeps himself pretty lean and healthy,” the insider said, “but he’s now on a mission to add some more muscle and see how fit he can get this year.” 

The *Horizon* actor, who celebrated his 70th birthday on January 18, is reportedly aiming to turn back the clock on his body and recapture the six-pack abs he was once known for in his heartthrob days. 

His personal trainer has reassured him that it’s entirely possible to achieve even at his age, which has left Costner feeling motivated and excited to take his fitness to the next level.

What’s driving this new fitness focus? According to the source, J.Lo’s fitness level and her “eternally young” energy have had a huge influence on Costner’s decision to hit the gym harder than ever before. The *Jenny From the Block* singer, who is 55, is renowned for her toned physique and dedication to health, which has left a lasting impression on Costner. “She’s among those inspiring him to hit the gym and prove age is just a number,” the insider added.

To achieve his goals, Costner is reportedly following a strict diet and exercise regimen. His trainer has put him on a high-protein plan that his personal chef will follow meticulously. His aim is to add 10 pounds of muscle before the summer arrives, and Costner seems fully committed to this new fitness mission.

While the 70-year-old actor is focused on his health, his recent time with Lopez has sparked a new level of intrigue about their relationship. The pair, who were spotted together at Kemo Sabe, a popular Aspen store, in late December 2024, have captured the attention of fans. Their public interaction was filled with smiles and lively conversation, leaving many speculating about the potential for a romantic connection between the two stars. Though they weren’t alone during their outing—Lopez’s 16-year-old twins, Emme and Max, were also with them—the chemistry between the two was undeniable. 

Their casual hangout quickly became the talk of Hollywood, and a source shared that both friends and fans believe that Costner and Lopez could make a “super fun match.” J.Lo also reportedly expressed her admiration for *Yellowstone* and mentioned her disappointment over Costner’s departure from the show. Costner, in turn, was flattered by Lopez’s praise for his current project, *Horizon*.

Both Costner and Lopez are currently navigating their personal lives after experiencing high-profile divorces. In May 2023, Costner’s 18-year marriage to Christine Baumgartner ended after a highly publicized split. The legal battles, including a contentious child support case, culminated in their divorce being finalized in February 2024. Meanwhile, Lopez filed for divorce from her second husband, Ben Affleck, in August 2024. Their divorce followed a whirlwind romance that included a second marriage, but rumors of trouble between the couple had been circulating for months. Lopez’s solo red carpet appearances and Affleck moving out of their shared home fueled speculation that their relationship was in jeopardy.

While their divorces are fresh in the public’s mind, it’s clear that Costner and Lopez have remained focused on their individual goals. For Costner, this means getting in the best shape of his life, while for Lopez, she continues to build her empire and inspire those around her. With both stars seemingly open to new opportunities, it’s anyone’s guess what the future holds for them, both personally and professionally.

For now, Costner is keeping his eyes on his fitness goals, and with Lopez’s example as a motivating factor, it seems he’s determined to prove that age truly is just a number. Whether this new fitness commitment will lead to a new chapter in his personal life remains to be seen, but one thing is certain: Kevin Costner is ready to take on 2025 with renewed energy and a focus on his health and well-being.

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