John Miller stands out as a sharp-minded entrepreneur who blends technology with everyday business, especially in the food industry. In this John Miller biography and net worth overview, we dive into the life of the man behind Cali Group, a company that’s changing how restaurants operate with robots and smart systems. Known for his low-key style and big ideas, Miller has built a solid fortune while staying out of the spotlight, except for his high-profile relationship with actress Jennifer Garner.
| Field | Details |
|---|---|
| Full Name | John C. Miller |
| Nickname / Stage Name | John Miller |
| Date of Birth | 1978 |
| Age | 48 (as of 2026) |
| Birthplace | Los Angeles, California, USA |
| Nationality | American |
| Occupation | Businessman, Attorney, Entrepreneur |
| Known For | Chairman and CEO of Cali Group, Innovator in restaurant technology, Relationship with Jennifer Garner |
| Height | 6 feet (183 cm) |
| Family / Spouse | Ex-wife: Caroline Campbell (married 2005, divorced 2018); Two children: Violet and Quest; Currently dating Jennifer Garner |
| Education | BA in Economics from University of Redlands, JD from Stanford Law School |
| Social Media Followers | Keeps a low profile with no major public social media presence |
| Estimated Net Worth | $25 million (as of 2025) |
Early Life & Background
John Miller grew up in the sunny streets of Los Angeles, California, where he spent his childhood surrounded by the buzz of a big city. Born in 1978, he came from a typical American family, though details about his parents or siblings stay private, matching his preference for a quiet personal life. From a young age, Miller showed a knack for smart thinking and problem-solving, interests that would later shape his career.
He pursued higher education close to home, earning a bachelor’s degree in economics from the University of Redlands in California. This foundation in business and money matters set the stage for his future ventures. Miller then took a big step forward by attending Stanford Law School, where he graduated with a Juris Doctor degree. At Stanford, he excelled, even earning membership in the Order of the Coif honor society, a nod to his top academic performance. After law school, he joined the California Bar, gaining skills as an attorney that would help him navigate the complex world of tech and business deals.
These early years built Miller’s drive to innovate, turning his legal knowledge into a tool for creating companies that solve real-world problems.
Career Journey & Achievements
Miller’s path to success started right after law school in 2003, when he joined Arrowhead Pharmaceuticals as one of its first employees. Based in Pasadena, California, the company focused on cutting-edge tech in nanotechnology. Miller rose quickly to become vice president of intellectual property, handling patents and legal strategies that helped the business grow. He stayed until 2011, playing a key role in building Arrowhead into a publicly traded company on NASDAQ.
Founding Cali Group
In 2011, Miller made a bold move: He left Arrowhead to start Cali Group, a holding company in Pasadena aimed at using technology to shake up restaurants and retail. What began as a fun idea with friends to open a burger spot turned into something much bigger. Cali Group owns CaliBurger, a chain that serves West Coast-style burgers with a tech twist, expanding to over 50 locations worldwide.
As chairman of Cali Group, Miller has invested in several game-changing companies. These include Miso Robotics, creators of Flippy (a robot that flips burgers to make kitchens faster and safer), PopID (a facial recognition system for quick payments), Kitchen United (focused on ghost kitchens for delivery), and Super League Gaming (an esports platform). He also served as CEO of CaliBurger from 2012 to 2014 and has been CEO of PopID since 2018.
Key Milestones
One of Miller’s biggest turning points came with the launch of Flippy in 2017, which caught global attention for automating fast-food tasks. This innovation helped Cali Group stand out during tough times, like the labor shortages in the restaurant world. In 2020, Nation’s Restaurant News named him to their Power List, recognizing his vision for tech-driven dining.
Miller also co-authored a book in 2004 called “The Handbook of Nanotechnology: Business, Policy, and Intellectual Property Law,” drawing from his Arrowhead days. His work has earned praise from industry leaders for blending law, tech, and food in fresh ways, though he avoids the limelight himself.
Personal Life & Relationships
Miller values privacy in his personal world, keeping things steady amid his busy career. He was married to Caroline Campbell, a talented violinist who has performed with stars like Sting and Andrea Bocelli. The couple tied the knot in 2005, but after some ups and downs (including a brief reconciliation after filing for divorce in 2011), they officially split in 2018. They share two children: a daughter named Violet (born around 2006) and a son named Quest (born around 2008). Miller and Campbell focus on co-parenting, putting their kids first.
Since 2018, Miller has been in an on-and-off relationship with actress Jennifer Garner. The pair keeps their romance low-key, enjoying simple dates and family time away from cameras. Sources like People magazine describe them as supportive partners who balance work and life well. Outside of family, Miller enjoys staying active and exploring new tech ideas, though he shares little about his hobbies publicly.
Net Worth & Financial Overview
John Miller’s estimated net worth sits at around $25 million as of 2025, based on reports from sites like CelebrityNetWorth and business analyses from Urban Splatter. Keep in mind, these figures are estimates drawn from public data on company values, investments, and executive pay, not official disclosures.
His wealth mainly comes from his leadership at Cali Group and its portfolio companies. Earnings flow from stakes in tech ventures like Miso Robotics and PopID, plus revenue from CaliBurger’s global chain. Early on, his role at Arrowhead built a strong financial base through stock and intellectual property deals. Miller also benefits from book royalties and smart investments in emerging tech.
Experts point to Cali Group’s growth, especially during the rise of delivery and automation post-pandemic, as a key driver of his fortune. For example, Flippy’s success has led to partnerships with major chains, boosting company valuations. While exact salaries remain private, similar CEOs in tech-food hybrids earn in the high six figures, with bonuses tied to innovation milestones.
Notable Facts & Trivia
Here are some fun bits about Miller that show his unique side:
- He started CaliBurger with no restaurant experience, turning it into a tech lab for ideas like robot cooks.
- As a Stanford grad, he was among the top in his class, using law skills to protect inventions.
- Miller’s companies have raised millions in funding, with Miso Robotics alone securing over $100 million from investors.
- He’s appeared in interviews on YouTube channels like NEC America, sharing visions for automated restaurants.
- Despite his success, Miller avoids social media, preferring face-to-face connections.
Impact & Legacy
John Miller matters because he’s pushing the restaurant world into the future, making it more efficient and fun with tech. His ideas, like robots handling repetitive jobs, help workers focus on better tasks and cut costs for businesses. In a time when fast food faces labor issues and high demands, Miller’s work influences chains worldwide, from small spots to giants.
Fans and industry folks see him as a quiet trailblazer, inspiring young entrepreneurs to mix fields like law and tech. His low-profile approach adds to his appeal, showing success doesn’t need constant attention. Over time, Miller’s legacy could redefine how we eat out, blending human touch with smart machines.
Frequently Asked Questions
John Miller’s net worth is estimated at $25 million in 2025, mostly from his roles at Cali Group and tech investments. These numbers come from sites like CelebrityNetWorth, using public business data.
Miller gained notice through his innovative work at Cali Group, especially with robot tech like Flippy. His relationship with Jennifer Garner also brought more public interest, though he stays private.
Key wins include founding Cali Group, developing Flippy the burger robot, and landing on Nation’s Restaurant News’ Power List in 2020. He also co-authored a book on nanotechnology law.
Miller continues as chairman of Cali Group and CEO of PopID, focusing on tech advancements in restaurants. He lives in California, balancing work with family and his relationship with Jennifer Garner.
While not loaded with personal trophies, his companies have won industry recognition for innovation, and he earned academic honors at Stanford.
He leads Cali Group, which includes CaliBurger, Miso Robotics, PopID, Kitchen United, and Super League Gaming.
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