Kevin Costner is ringing in his 70s with a renewed sense of purpose and motivation, thanks to a little inspiration from none other than Jennifer Lopez. 

After a New Year’s getaway in Aspen, the *Yellowstone* star has made it his mission to get into peak physical condition, 

aiming to get back to his heartthrob days by sculpting his body and adding more muscle. 

An exclusive source shared with *In Touch* that Costner is determined to embrace a healthier, fitter lifestyle following his milestone 70th birthday on January 18, 2024. 

“Kevin keeps himself pretty lean and healthy, but now he’s really focused on building more muscle and seeing how fit he can get this year,” the insider revealed. 

According to the source, Costner’s goal is to add 10 pounds of muscle in time for summer, and he’s already working with a trainer to make it happen. 

His trainer has assured him that, despite his age, achieving a lean, muscular physique is entirely possible, which has Costner feeling “pumped up.” His new fitness journey is even designed to help him regain his youthful confidence, with aspirations of rocking a six-pack once again, much like he did in his earlier years as a Hollywood heartthrob.

The inspiration behind this new fitness commitment comes from none other than J. Lo herself. Costner, who’s been spending time with the 55-year-old singer and actress, is reportedly in awe of her “incredibly fit” body and her “eternally young” presence. “She’s among those inspiring him to hit the gym and prove age is just a number,” the source explained. J. Lo’s dedication to fitness and her age-defying energy have sparked a fire in Costner, who’s now ready to challenge himself both physically and mentally in the gym.

To support his goal, Costner is following a strict high-protein diet that complements his rigorous training regimen. A personal chef is helping him stick to the plan, ensuring that he gets the necessary nutrition to achieve his muscle-building goals. The 70-year-old actor is determined to show the world that it’s never too late to get into shape and turn back the clock when it comes to physical fitness.

Costner and J. Lo’s recent interactions have also sparked curiosity among fans and Hollywood insiders. The two were spotted together during a holiday trip to Aspen on December 27, 2024, where they were seen chatting and enjoying the company of mutual friends at Kemo Sabe, a popular celebrity shopping spot. Their public meetup made headlines, and fans couldn’t help but speculate about their relationship dynamics. According to a source close to the pair, there is potential for a romantic connection. “J. Lo expressed her love of *Yellowstone* and her disappointment over Kevin’s departure from the show, and he was hugely flattered,” the insider said. The source added that J. Lo’s praise for Costner’s new project, *Horizon*, also played a significant role in boosting his ego.

As both Costner and Lopez navigate their respective personal lives, the timing of their interactions has led many to wonder if they could become more than just friends. Both stars are currently single after experiencing highly publicized divorces. Costner’s marriage to Christine Baumgartner ended in May 2023 after 18 years together, with a final divorce settlement reached in February 2024. Baumgartner’s quick rebound with former neighbor Josh Connor, whom she became engaged to in January 2024, further highlighted the couple’s split.

Lopez, meanwhile, filed for divorce from Ben Affleck in August 2024, just a few years after their highly anticipated reunion in 2021. After tying the knot in a Las Vegas ceremony and later hosting a celebration in Georgia, the couple’s marriage ultimately ended, adding to the speculation that Lopez’s latest relationship chapter is closing, just as Costner’s new one begins.

As Costner looks to elevate his fitness and romantic prospects, it remains to be seen how his dynamic with J. Lo will evolve. While the two have clearly forged a connection, only time will tell if their bond turns into something more serious. For now, Costner is focused on achieving his personal goals, taking inspiration from the stars around him as he moves into this exciting new chapter of his life.

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