Minnillo, 30, isn't the first celebrity bride to walk down the aisle in Monique Lhuillier: Reese Witherspoon, Scarlett Johansson and Jessica Alba all chose dresses from the designer's collection for their weddings.
A source told Us Weekly that Minnillo and The Sing-Off host, 37, exchanged their vows at the top of a cliff overlooking the ocean on Necker Island. They first arrived to the island on Tuesday via a private jet. The wedding was extremely small and close family only.
They allowed reality cameras to document their big day as a part of a TLC wedding special.
"We kind of wrestled with that for a while, for obvious reasons," Lachey told reporters during his bachelor party earlier this month. (He famously allowed MTV's cameras to document his first wedding -- and the honeymoon phase -- with Jessica Simpson.) "Having done reality TV in the past, I didn't necessarily want to jump right back into it without having thought it through to great length, and we did."