IMDb profile, he appeared in the 2006 romance-comedy film, "Blind Dating."
John and his mother share a strong bond and have even made several red-carpet appearances alongside his famous mother. While celebrating John's 25th birthday in November 2020, his mother penned on IG a sweet tribute.
The actress reflected on watching him grow and spending more time with him as an adult, enhancing their strong bond by doing fun activities together, like going on road trips, painting, and listening to the music he had created.
Jane Seymour and John Keach at a private residency on April 21, 2012, in Malibu, California. | Source: Getty Images
While John was named after the late singer Johnny Cash, his twin brother, Kristopher Steven Keach, was named after the later actor Christopher Reeve. While Kristopher prefers living away from the limelight, he frequently appears on his mom's Instagram page. Though less is known about John's twin brother, his mom described him as hardworking.
John's half-sister, Katherine Flynn, was born in January 1982 to Jane and her ex-husband David Flynn. Katherine pursued an acting career, appearing in several movies and TV shows. She also starred alongside her famous mother in the 2018 romance drama film, "Mistrust."
Jane Seymour with her twin sons John and Kristopher at her home overlooking the Pacific ocean on June 12, 2002, in Malibu, California. | Source: Getty Images
While John's sister has lived in the spotlight, less is known about her personal life besides being a proud mother to two daughters, Willa and Luna. John's half-brother, Sean Michael Flynn, was born in July 1985. Sean also pursued an acting career but prefers living a low-key life.
Some of his acting projects include the 1997 drama film "Destination Anywhere" and the TV series, "Dr. Quinn's Medicine Woman." Besides acting, Sean is also a writer, director, and producer; he released his short film, "Numb" in 2007.
Jane once discussed the experience of raising her children, and she shared that her older kids played a significant role in raising John and his twin brother. The actress also emphasized her strong bond with her children, including her stepchildren, Jenni Flynn and Kalen Keach. She revealed that her children maintain close relationships with all of their fathers, and she gets along well with her ex-husbands.
Jane has been supportive of her son's music career, and she attends his shows regularly. In 2019, the "Somewhere In Time" actress shared a heartfelt post, revealing that John had played four songs, showcasing his solo guitar and piano talents.
John's band goes by the name SMILE. The group features Robin Taylor Zander, who is the lead vocalist and guitarist, alongside John. Hunter Tidwell plays the drums, while Jacob Corenfloss handles the bass guitar.
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