Who is Jennifer Garner's boyfriend? Meet businessman John Miller

After a high-profile split with ex-husband Ben Affleck, Jennifer Garner has kept her relationship with CEO John Miller fairly private. The 52-year-old 13 Going On 30 star was first linked to her beau in 2018, after the actress' divorce from Affleck was finalized.

Despite Affleck's split from Jennifer Lopez earlier in the year, mother-of-three Garner is not keen to strike up another romance with Affleck, and remains content. The couple went their separate ways briefly in 2020, but the pair rekindled and have been together ever since. They appear to enjoy a relationship out of the public eye.

While they have been plagued with rumors that Miller is jealous of his girlfriend's close relationship with her ex, the pair were recently spotted saying a sweet goodbye after spending time together. Garner maintains a amicable co-parenting relationship with Affleck, with whom she shares Violet, 19, Fin, 16, and Samuel, 12.

The actress is also involved with Miller's two children from his previous marriage. Here, FEMAIL delves into every thing we know about John Miller. Jennifer Garner has kept her relationship with CEO John Miller fairly private (pictured together in 2023).

Despite Affleck's split from Jennifer Lopez earlier in the year, mother-of-three Garner is not keen to strike up another romance with Affleck, and remains content. John Miller, 47, is the chairman of CaliGroup, he also serves as CEO of CaliGroup's portfolio company, PopID.

Cali Group is an investment company focused on computer vision, AI, and robotics for the restaurant and retail industries, as per the company's LinkedIn. Miller also has a keen interest in nanotechnology, co-authoring a book in 2004. The paper, titled The Handbook of Nanotechnology Business, Policy and Intellectual Property Law,  provides a comprehensive analysis of the commercial challenges and legal considerations of nanotechnology, as per the synopsis.

Miller was previously to musician Caroline Campbell from 2005 to 2011 with whom he has two children. Campbell is a professional violinist who has played with Stevie Wonder, Norah Jones, and recorded film scores for films such as The Curious Case of Benjamin Button, and Spider Man.

John Miller, 47, is the chairman of CaliGroup, he also serves as CEO of CaliGroup's portfolio company, PopID. Garner and Miller were reported to be dating in 2018, not long after Garner and Affleck's divorce was finalized. A source told People at the time that Garner had considered herself single 'for a long time,' even before the divorce was legally official.

'Jen will always care about Ben and help him be the best dad. She was very ready to move on though,' they explained. The pair briefly split in 2020, with Garner saying enthusiastically that she was 'looking forward to a whole new decade.'. However, the pair were spotted together again in 2021 in New York, with a source telling People the actress was 'very happy' to be back with Miller.

In 2025, Miller even discussed buying a home near Garner's before the devastating Los Angeles wildfires broke out last month. '[John] spends a lot of time [at her house],'a source said. The couple prefer to stay out of the limelight, and have only been photographed occasionally together.

Garner and Miller were reported to be dating in 2018, not long after Garner and Affleck's divorce was finalized. Garner maintains a amicable co-parenting relationship with Affleck, with whom she shares Violet, 19, Fin, 16, and Samuel, 12. In January, Garner and Miller sparked wedding rumors after she was reportedly spotted with a diamond ring on her left ring finger.

The sparkly sight prompted speculation that she and Miller had gotten engaged. In October, a source claimed the loved-up pair are planning a wedding in Paris in the spring, after she allegedly went shopping for a bridal gown there. According tot the source, the duo love to travel to Europe and Paris is one of their favorite destinations.