The couple are set to tie the knot later this year and have teamed up with TLC for a reality show about the run-up to their big day.
Given a working title of Nick & Vanessa's Dream Wedding, it will include footage from their joint wedding shower, Minnillo's hunt for the perfect dress and the rest of the planning before culminating with the ceremony itself.
In a statement to Us Magazine, Lachey, 37, and Minnillo, 30, said, 'We're lucky to have such passionate and loving fans, and we thought partnering with TLC on this special would be the best way to share the exciting journey we're on with all the people that support us and our relationship.'
Sharing his relationships with the world is nothing new for Lachey, who previously starred in Newlyweds with ex-wife Jessica Simpson.