"John has shown Jen that he doesn't care about fame and Jen really likes that about him," the source says. "He is a down to earth, hardworking guy and they have a strong, natural connection. They relate to each other because they are both very hands-on parents who love their children very much. John has made a big effort to be in Jen's life and they're rekindling their relationship."
In January 2019, a source told ET that Garner was getting "serious" with Miller, who is himself a dad of two children from his previous marriage.
"Jen feels so lucky to have met John and their relationship only continues to grow," the source said. "They both wanted to take it slow, but it has gotten serious and they couldn't be happier. John's been at their Palisades house so much lately. They all [John, Jen and their kids] stay up late playing board games."
Their two-year relationship came to an end in mid-2020, as a source told ET in August that the two "called it quits several months ago."
"They've remained friends. They just started seeing less and less of each other and finally called it quits," the source explained. "She has nothing negative to say about John; they just seemed to drift apart. She says he was an amazing stepping stone in her life."
"Jen's focus still remains on her children, her career and spending time with those who make her really happy," ET's source added.