The pair tied the knot in an intimate ceremony in London in late June. Guests included David's daughters, Sara and Erin Foster. "Exactly 13 years ago today my very first single, 'Somewhere Over The Rainbow,' was released right after Idol," Katharine wrote on Instagram. "Today... I'm marrying the man who produced it. Life is full of beautiful coincidences, isn't it? Thank you for taking me over the rainbow, David."