Delfino's former Roswell costar, Katherine Heigl, served as a bridesmaid, and guests included Heigl's husband Josh Kelley, as well as Walton's costar Hayes MacArthur and wife Ali Larter, PEOPLE confirms exclusively.
The ceremony took place at Trinity Cathedral, the oldest church in Miami, and the reception was held at The Surf Club ballroom, one of Miami's oldest private beach clubs – and one with a special meaning for Delfino. She had her debutant ball there at 19.
Following the reception, Delfino, 30, Walton, 32, and their 200 guests kept the celebration going at an after-party that included cigar rollers, Cuban coffee and empanadas. DJ Hottpants entertained guests with tunes until the wee hours of the morning.
"We really wanted to embrace all that is Miami by combining old-world Miami with the fresh new scene of art and design," the newlyweds told PEOPLE. "And of course, we had to embrace that crazy Miami party energy with a party that lasted all night!"
As for fashion, on her big day Delfino walked down the aisle in a Valentino gown with earrings by Samuel Gatz. For the reception, she wore a Provonias dress, while the bridesmaids were decked out in Nektar De Stagni jewelry.