By Adam B. Vary
Updated April 22, 2011 at 12:00 PM EDT

Singer LeAnn Rimes and actor Eddie Cibrian were married on Friday in a private ceremony in California, People is reporting. The wedding was a surprise for the roughly 40 guests, who had arrived believing they were attending an engagement party. Rimes, 28, and Cibrian, 37, got engaged in December.