People magazine reported that James, 43, married professional drag racer Alexis DeJoria, 43, on Sunday in Malibu, Calif.
According to the magazine, James's youngest daughter, Sunny, 9, and DeJoria's daughter Bella, 10, acted as flower girls.
Engaged late last year, the couple exchanged vows at the Malibu home of DeJoria's father, John Paul DeJoria, the billionaire businessman behind the Paul Mitchell hair care products line.
Though James has not confirmed his new marital status, he did post a picture Sunday of himself walking hand in hand with DeJoria, along with the quote, "Happiness is only real when shared - Jon Krakauer."
The pair live in Austin, Texas, where James recently opened a West Coast Choppers custom motorcycle shop after closing the original in California.
This is the fourth "I do" for James, who got divorced from Sandra Bullock in June, 2010, amid reports of his infidelity. His second marriage was to tattooed porn star Janine Lindemulder, mother of Sunny. His first wife, Karla James, whom he met before he became a popular television personality, is the mother of his two sons.
James broke off his engagement to tattoo artist Kat Von D in September 2011.