Carin Kingsland and Mark McGrath arrive at the Adopt The Arts kick off event on March 18, 2012 in Los Angeles, California. Credit: Chelsea Lauren/

After 18 year of dating, Mark McGrath married his longtime girlfriend Carin Kingsland on Monday Sept. 24.

The Sugar Ray frontman, 44, became engaged to Kingsland on New Year's Eve 2009. "Mark and Carin are tying the knot today up here in Santa Barbara," his manager, Chip Quigley, tells Us Weekly Monday. "Just a few friends and family to celebrate their longtime love affair . . . beautiful day. Great people."

McGrath and Kingsland are parents to 2-year-old twins, son Lydon Edward and daughter Hartley Grace.

After struggling to conceive, McGrath told Parent Dish in December 2010 that becoming a father was "the greatest thing that has ever happened to me."

"I tried my hardest the conventional way, but that didn't work out for us. We did the IVF thing. It was intense and expensive, but we did it in one shot and, boom, here they are," he said. "My job now is to be the best parent I can be because that is all that matters."