A Milestone Moment: Jennifer Garner & Boyfriend John Miller's Kids Meet Each Other — Details

Jennifer Garner and John Miller took a major step in their relationship over the weekend.

"John’s kids finally met Jen’s kids," an insider spilled of Garner's three kids with ex-husband Ben Affleck and Miller's two children with ex-wife Caroline Campbell. The major milestone in the couple's relationship reportedly took place on Saturday, April 16, at a food drive for the 13 Going on 30 star's 50th birthday.

"Lots of kids and family were invited, including John’s kids, his parents, his brother and his [brother’s] wife," the source told UsWeekly, noting of both the Juno actress and her handsome hunk: "They all had friends there. It was casual and easy."

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The low-key couple was first publicly linked in October 2018 after they had been quietly seeing each other for months prior. "Jen brings out the best in John, and he is the happiest he has probably ever been," gushed a source to the outlet when news of their romance made headlines at the time. "It’s a loving, healthy relationship."

Despite appearing to be on cloud nine, The Adam Project actress and the CaliGroup CEO called it quits less than two years after their relationship was made public, with an insider telling the outlet Miller was "ready for marriage and she just couldn’t commit."

However, within nine months, Garner and Miller decided to give their romance another ago, as a source spilled in May 2021: "Jen and John are back on. It started up a few weeks ago."

And while they have reconciled — with the pair being spotted together last month at New York's JFK airport — the lovebirds are taking things slow, which may be why they're only now blending their children together.

"They have been keeping their kids separate from their relationship for a long time," explained a source to the publication in September 2021, "but now plan to incorporate their kids more."

Ever since reconciling, Garner and Miller appear to be doing better than ever, with an insider exclusively squealing to OK!: "As far as Jen is concerned, John is Mr. Wonderful."

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Nevertheless, it seems introducing their kids is the only major milestone Garner is willing to take as of now. Another OK! insider hinted the mother-of-three isn't planning to walk down the aisle anytime soon, as the actress still enjoys her alone time. "John would love to be with Jen 24/7, but she tends to set boundaries," said the source.

Meanwhile, the slow pace the brunette beauty is going at is quite the opposite of her ex-husband.

After Garner and Affleck split in 2015 and finalized their divorce in 2018, the actor rekindled his long lost romance with Jennifer Lopez, as their first shot at love came crashing down in the early 2000s due to the media frenzy that surrounded their relationship.

Most recently, Lopez announced earlier this month that she and her Hollywood beau are engaged again.