Who is John Miller’s ex Caroline Campbell? Jennifer Garner’s boyfriend reportedly spotted with former wife

American businessman John Miller, actress Jennifer Garner’s boyfriend, is making the headlines after getting spotted with his ex-wife, Caroline Campbell. According to a TMZ report, the former couple was photographed on March 9, 2025, while they were about to sit in the same car.

Reportedly, there are no updates on why they met and where they were headed on Sunday. With pictures of John Miller and Caroline Campbell making rounds on social media now, many are curious to know more about her.

Campbell, 45, is a renowned American violinist. Per her official website, she has taken the stage as a soloist with the Cleveland Orchestra, Boston Pops, Los Angeles Philharmonic, Indianapolis Symphony, and more famous orchestras.

The news of Caroline and John catching up surfaced a few days after Jennifer Garner was seen with Ben Affleck and their children at a paintball game. Snaps of them hugging affectionately created a buzz on the Internet. Garner and Affleck seemed to have fun at Samuel, their third kid's 13th birthday.

In a conversation with People, the former couple's source revealed,

"They have been on good terms for a while now and seem to enjoy chatting and hanging out."

Everything we know about violinist Caroline Campbell

Caroline Campbell has mesmerized audiences with her noteworthy performances in different parts of the world. From Carnegie Hall to the Kennedy Center, Sydney Opera House, Madison Square Garden, and more, she has performed solo in world-famous locations.

From New York to Versailles to Kuala Lumpur, she traveled the world for her captivating shows. Fondly called the violinist to the stars, she explored five continents to perform with Chris Botti, the famous American trumpeter and composer. The superhit duo hosts remarkable shows even today.

Caroline Campbell features many feathers in her cap, and some of her career's significant highlights are performing duet shows with Adam Levine, David Foster, Andrea Bocelli, Barbra Streisand, Michael Buble, Rod Stewart, and Steven Tyler, among many legendary artists. Additionally, she appeared on PBS Specials of Chris Botti.

Andrea Bocelli, the 66-year-old well-known Italian tenor, lauded Caroline for her charisma.

"She is a fair-haired angel with a bow, who, when on stage, has such grit and musicality as to leave you breathless."

Appreciating her skills, he further continued:

"On the four chords of her violin, Caroline Campbell knows how to be an acrobat without a safety net, she knows how to seduce, to move people and make them dance. It is always a great joy to share the stage with such a brilliant and charismatic artist."

Presently staying in Santa Monica, she has been appearing at many popular events and on TV shows. Some of her notable on-screen visits include American Idol, The Tonight Show With Jay Leno, The Ellen Degeneres Show, MTV Movie Awards, Grammy Awards, Dr. Phil, Saturday Night Live, People's Choice Awards, American Music Awards, Late Night With Conan O' Brian, Jimmy Kimmel Live!, The Young And The Restless, Late Show With David Letterman, and The Tyra Banks Show.

John Miller and Caroline Campbell married in April 2005. Per a Country Living report, Miller started divorce proceedings in 2014. After 13 years of marriage, they divorced in November 2018 and shared joint custody of their kids.