• Jennifer Garner was wearing a massive ring during an Instagram Live with Judy Greer Tuesday
  • The engagement rumors came months after Garner and John Miller got back together
  • Garner and Miller started dating in 2018 but split in 2020; they got back together in August

Jennifer Garner sparked engagement rumors during her recent sighting when she was spotted wearing a diamond ring.

The "Yes Day" actress joined her "13 Going on 30" co-star Judy Greer for an Instagram Live chat Tuesday. The pair discussed "the pros and cons of being sober-ish," Us Weekly reported.

At the beginning of the video, Garner held a mug of tea with both of her hands. The audience immediately noticed the diamond ring with pearl embellishments on her left finger.

Garner has been dating John Miller for several months after they reconciled. The two are notoriously private when it comes to their romance.

Garner and Miller's relationship made headlines in October 2018 after she finalized her divorce from her ex-husband, Ben Affleck. A source told Us Weekly at the time that they had been going out for six months already.

"Jen brings out the best in John, and he is the happiest he has probably ever been. It’s a loving, healthy relationship," the insider said.

At the time, Miller was still legally married to Caroline Campbell. But their divorce was finalized in November of the same year.

Sources said Miller and Garner were in similar places in their lives and could relate to raising kids after their respective divorces. So, they were "on the same page and understand where things stand."

However, they split in August 2020 after she was spotted in Malibu bonding with her pal and "Alias" co-star Bradley Cooper. Several sources said back then that Garner and Miller parted ways weeks before their split made the headlines.

The pair reunited less than a year after their split. In May, another unnamed insider told Us Weekly that "Jen and John are back on," adding that their reignited romance "started up a few weeks ago." Following the report, the actress and the CaliGroup CEO have been spotted out and about in public.

In August, Garner was photographed driving her car to pick up the businessman at an apartment building. In September, they were spotted in New York City grabbing coffee together.

Garner hasn't addressed the engagement rumors yet. The "Miracles from Heaven" star was last spotted over the weekend reuniting with Affleck and his girlfriend, Jennifer Lopez, trick-or-treating in Malibu with their children.

Jennifer Garner
CULVER CITY, CALIFORNIA - NOVEMBER 09: Jennifer Garner attends 2019 Baby2Baby Gala Presented By Paul Mitchell at 3LABS on November 09, 2019 in Culver City, California. Frazer Harrison/Getty Images

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