Things are heating up between Jennifer Garner and her boyfriend John Miller.

The duo passionately kissed in a steamy embrace outside his Los Angeles home, according to photos published by TMZ on Friday.

The snaps showed Garner, 53, wearing a casual blue plaid shirt and black pants while making out with Miller, 47. She also clutched her keys and a phone during the al fresco encounter.

Miller was similarly low-key in a gray T-shirt and jeans.

The pics put a damper on speculation that Garner and her ex-husband, Ben Affleck, could reunite following “The Accountant 2” star’s divorce from Jennifer Lopez after two years of marriage.

After photos of Affleck, 52, embracing Garner during a family paintball outing emerged in March, rumors kicked into overdrive.

“They really do have a close bond,” a source told Page Six in January of the exes, who share kids Violet, 19, Seraphina, 16, and Samuel, 13.

An insider told Page Six in March that Miller had issued an ultimatum amid the former couple’s increasing time together with their children.

Garner’s longtime boyfriend, whom she has been dating on and off since 2018, “has always been supportive of Ben and Jen’s co-parenting relationship but feels Ben crossed the line,” the source said at the time.

“John knows there’s nothing going on between Jen and Ben, but he doesn’t think those photos are a good look and feels it’s disrespectful to their relationship.”

They added, “He doesn’t want to see anything like that again or he has no choice but to walk away.”

For his part, Affleck “would love another chance” with Garner, a source exclusively told Page Six in March.

Though the insider said the “Air” actor “would definitely be open to giving things another shot with Jen if the timing is ever right,” they added that “Ben knows it’s just not realistic at this time in their lives.”

“Ben just got out of a marriage and finalized his divorce [from Jennifer Lopez], he is really busy with work and is focused on this new chapter,” they explained, adding that the “Justice League” star “respects Jen’s relationship with John [Miller] and would never come between them.”

The “13 Going on 30” actress apparently isn’t at all interested in rekindling a romance with Affleck.

The “feeling is not mutual,” a source for Page Six said in March. Garner is “happy” with the CaliBurger CEO and “that’s just not where her head is at.”

“Jen has a great co-parenting relationship with Ben, and that’s where things stand on her end at the moment,” they said.