Costello and D'Agostino were married at the Hyatt Regency Hotel in Boston on Saturday in front of 160 guests. Almost the entire Nantucket-style wedding, from the location down to the dress and decorations, was donated by local businesses like the Hyatt, wedding planner Rachael Gross, and Bella Sera Bridal Boutique.
The couple exchanged vows outdoors on the Hyatt's third-floor terrace
surrounded by hydrangeas, followed by a reception in the hotel's grand
ballroom where the couple had their first dance to John Legend's "All of Me."
"They are the most gracious, generous, kind ... loving couple," Gross told NBC News. "They believe that they were meant to meet."
The couple's love story may have started with tragedy, but Costello told NBC's Today show that, for him, the bombing was a blessing in disguise.
"One thing that she hates that I always say is I'm actually glad I got
blown up," Costello told Today's Savannah Guthrie. "I wish
everyone else didn't have to, but I don't think I would have ever met
her if I didn't, so I'm pretty happy."
The couple met after Costello was transferred from Massachusetts General Hospital, where he underwent multiple surgeries for shrapnel injuries and burns, to Spaulding Rehabilitation Hospital. He says that he first noticed Krista in passing, but after she helped redress one of his wounds, he asked her out on a date.
Last December, Costello and D'Agostino went on a 10-day "Heroes Cruise" to France organized for the Boston Marathon bombing's survivors and first responders. When in Lyon, Costello decided to pop the question.
He then wrote on his Facebook page:
April 15 was one of the worst days of my life. I soon wondered why and for what reason this has happened. I now realized why I was involved in the tragedy. It was to meet my best friend, and the love of my life. Eight months later I’m happy to announce that we will spend the rest of our lives together.