The Sugar Ray frontman and longtime love Carin Kingsland tied the knot on Monday morning, PEOPLE exclusively confirms.
"After 18 years of breakups, makeups, beautiful twins and an unwavering love that provided some pretty damn good song lyrics, we are happy to announce that we are finally married!" the rocker, 44, and his bride, 39, tell PEOPLE.
The couple exchanged vows in front of about 60 friends and family members in Southern California.
Their 2-year-old twins – son Lydon and daughter Hartley – served as the ring bearer and flower girl at the colorful and chic event.
It's the first marriage for both McGrath and Kingsland, who got engaged on New Year's Eve 2009 when McGrath proposed at the L.A. club the Viper Room, the same spot where they met in 1994.
Following the success of their U.S. summer tour with contemporaries Everclear, Lit, Gin Blossoms and Marcy Playground, Sugar Ray will return to the road for a South American tour in October.