Perfect Endings of Napa Valley created the simple four-tier wedding cake adorned with roses, which guests sampled before getting down on the dance floor to the strains of a 16-piece orchestra from West Coast Music. The bride wore a custom-made ivory satin gown with chantilly lace and bead overlay by Badgley Mischka ("It was perfection," says Hannigan); the groom donned a Hugo Boss suit.