Jennifer Garner and new boyfriend John Miller's relationship is reportedly "healthier" than the one she had with Ben Affleck for a reason.

A source recently told Entertainment Tonight that Garner and Miller share an interest in living a healthy lifestyle and a love for the outdoors. This is apparently very different from her relationship with Affleck, whom she split with back in 2015 and finalized her divorce from in October last year.

"Jen has something very different with John than she had with Ben," the source revealed. "She and John are both interested in living a healthy lifestyle, working out and eating well, except for the occasional trip to Chick-fil-A!" 

Garner and Miller also include their kids when they enjoy outdoor activities together. Garner shares three children with Affleck: Violet, 13, Seraphina, 10, and Samuel, 6. Miller, meanwhile, has two children with ex-wife Caroline Campbell. 

"They've already taken the kids to the mountains together, and Jen's friends describe John as a mountain man," the source continues. "He loves to do outdoorsy things.”

Garner and Miller reportedly also love spending time together as a couple, including watching movies and having "romantic dinners," whenever they aren't with their children. But the couple apparently also like staying at home and having some family bonding time, according to the source. The businessman and his kids are reportedly often at Garner's Pacific Palisades home, and the couple and their children stay up late playing board games.

Garner and Miller were last seen in public together before Valentine's Day, enjoying a breakfast date together at the Farmshop restaurant in Brentwood Country Mart mall in Los Angeles. Photos from the sighting showed Miller embracing Garner before the two left the mall separately to go about their day.

Prior to this, the "Peppermint" star was photographed leaving Miller's home in LA on Feb. 2. Garner wore a dark jacket, heavy scarf, faded denim jeans and dark brown boots as she headed to her car that evening. 

As for Affleck, he and Garner continue to share parenting duties for their three children. The "Justice League" star has been snapped with his kids several times over the past few weeks, which may mean that they are staying with him while Garner is moving into a new home

Earlier this week, Affleck was photographed picking up daughter Seraphina from soccer practice. The actor-director held his middle child's hand as they got ice cream and when they headed to his car in photos obtained by Daily Mail.