The Celebrity hitmaker reached the relationship milestone on Sunday (15Mar15) and the happy couple marked the occasion by walking down the aisle all over again.
Nashville actress Williams-Paisley tells Usmagazine.com, "We did a really, really campy wedding vow renewal ceremony. It was awesome."
The nuptials took place a "a friend's house" and Paisley even had one of his wife's closest pals pick out her new wedding dress, so the actress would have no clue about what he was planning.
She says, "One of my best friends went and bought it for me. It was a surprise, I didn't know we were doing it."
The stars' two sons, Huck and Jasper, served as witnesses and the proud mother enjoyed having them involved.
She adds, "We had a traditional wedding march... Our processional walk. It was very casual and very campy and silly. It was perfect."