5 Surprising Facts About John Miller: Jennifer Garner's Low-Profile Tech CEO Partner

John Miller has intentionally kept a low profile, especially considering his long-term, stable relationship with Hollywood superstar Jennifer Garner. While the public eye often focuses on the drama surrounding Garner’s ex-husband, Ben Affleck, and his life with Jennifer Lopez, Miller has quietly established himself as a highly successful businessman, attorney, and CEO, building a powerful tech and restaurant empire. As of December 2025, the couple's romance is reportedly stronger than ever, with sources indicating they have truly "hit a stride as a couple" after years of dating and a brief split.

This deep dive aims to pull back the curtain on the man who prefers the boardroom to the red carpet, exploring his impressive career trajectory, his significant role in the tech world, and the details of his enduring, private relationship with the 13 Going on 30 actress. His life is a fascinating blend of high-powered corporate strategy and a commitment to maintaining personal privacy, a rare feat in the celebrity sphere.

John C. Miller: Complete Biography and Profile

• Full Name: John C. Miller
• Occupation: Businessman, Attorney, Tech Executive
• Primary Role: Chairman and CEO of CaliGroup (CaliBurger's parent company)
• Education: Stanford Law School (Alumnus)
• Known For: Developing AI and tech-related innovations, particularly within the restaurant industry.
• Relationship Status: Dating actress Jennifer Garner (since 2018, with a brief split in 2020)
• Previous Marriage: Married to violinist Caroline Campbell (divorced)
• Children: Two children from his previous marriage
• Current Status: Reportedly in a strong, stable, and low-key long-term relationship with Jennifer Garner.

The Man Beyond Hollywood's Glare: John Miller's Tech and Restaurant Empire

While John Miller’s name frequently appears in celebrity gossip columns, his professional identity is firmly rooted in the world of technology and corporate leadership. He is best known as the Chairman and CEO of CaliGroup, a holding company that operates a diverse portfolio of businesses, most notably the CaliBurger restaurant chain.

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Miller's background as an attorney, graduating from the prestigious Stanford Law School, provides a strong foundation for his executive career. However, his focus shifted significantly toward innovation, making CaliGroup a pioneer in integrating artificial intelligence (AI) and robotics into the food service industry. This is where Miller's true vision lies—transforming the fast-food experience through cutting-edge technology.

CaliGroup and the AI Revolution in Food Service

CaliGroup’s mission is not just about serving burgers; it’s about creating a more efficient, automated, and ultimately scalable business model. Miller has been instrumental in deploying technologies like the "Flippy" robot, a kitchen assistant designed to flip burgers autonomously, dramatically reducing the need for human labor in repetitive tasks. This focus on automation and AI is a core part of his business strategy, positioning CaliGroup as a leader in restaurant tech.

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The company also utilizes facial recognition technology for loyalty programs and point-of-sale systems, streamlining operations and enhancing the customer experience. This commitment to developing and implementing tech-related innovations is what distinguishes Miller in the business world, moving him far beyond the simple label of a "restaurant executive."

A Stable Romance: The Timeline of John Miller and Jennifer Garner

The relationship between John Miller and Jennifer Garner has been a quiet counterpoint to the highly publicized lives of her ex-husband, Ben Affleck, and his wife, Jennifer Lopez. Garner and Miller began dating in 2018, shortly after Garner finalized her divorce from Affleck. Their initial connection was reportedly low-key, valuing privacy above all else.

A Brief Split and Stronger Reconciliation

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The couple experienced a brief split in 2020, but they rekindled their romance in 2021. Since their reconciliation, the relationship has reportedly become stronger and more stable than ever. They have successfully blended their families—Miller has two children from his previous marriage to violinist Caroline Campbell, and Garner has three children with Ben Affleck.

Sources close to the couple consistently emphasize the quiet, mature nature of their bond. Unlike many celebrity relationships, their long-term romance has remained largely out of the spotlight, a deliberate choice that contributes to its longevity. They are frequently seen spending relaxing weekends together at Garner’s Brentwood mansion or engaging in low-profile outings, often holding hands, a clear sign of their enduring commitment.

The stability of their partnership is a testament to their shared desire for a private life despite their high-profile careers. While speculation about an engagement or wedding occasionally surfaces, the couple remains focused on their current dynamic, which is described as being "in a good place" and having "hit a stride."

The Future of CaliGroup and Miller's Vision for Tech Innovation

John Miller's current activities remain heavily focused on expanding the reach and technological capabilities of CaliGroup. His role is not simply administrative; he is a hands-on tech evangelist committed to the future of automated services.

Expanding the Global Footprint

Under Miller's leadership, CaliBurger has expanded its global footprint, utilizing the technological innovations developed by CaliGroup to ensure consistency and efficiency across international locations. This global strategy relies heavily on the scalable AI and robotics platforms that Miller has championed, making the company a case study in modern, tech-driven business expansion.

Miller’s vision extends beyond just the CaliBurger brand. He is focused on how the proprietary technologies developed within the group can be licensed or adapted for other industries, demonstrating a forward-thinking approach to monetizing intellectual property. This makes him a significant figure in the intersection of law, business, and emerging technology.

Maintaining a Private Life Amidst Public Scrutiny

Despite his professional success and his highly visible partner, John Miller has managed to maintain a remarkable level of privacy. This deliberate choice is a key component of his persona. He avoids the typical celebrity circuit, rarely gives interviews about his personal life, and is focused on his business ventures. This grounded approach is reportedly a major factor in the success of his relationship with Jennifer Garner, providing a stable, non-Hollywood foundation for their life together.

In a world obsessed with celebrity, John Miller represents the successful, ambitious, yet intensely private partner who provides a necessary anchor. His career as a tech executive and his commitment to a low-key romance with one of Hollywood's most beloved stars continue to make him a subject of quiet fascination. He is not merely "Jennifer Garner's boyfriend," but a powerful business leader shaping the future of the food and tech industries.