Daniel Boczarski, Redferns
Davis's bandmate Hayley Williams, Paramore's orange-haired frontwoman, served as a bridesmaid, UsMagazine.com reports, and the Tennessee pop-punk foursome posted a picture of the ceremony on its website.
"Today I married my dream girl and couldn't be any happier," Davis tweeted. "I love you, Kathryn!"
The Twitter gushing didn't stop there, and in a follow-up post, he called the wedding "hands down the best day of my life!!"
Watch Paramore's 'Playing God' Video