The couple reportedly exchanged handwritten vows during an intimate ceremony at Lutheran Evangelical Church in New York in front of ten of their closest friends and family.
Roxanne, 37, donned a strapless ivory, mermaid gown with embellishments as well as an ornate Grecian headpiece and veil, and Jason, 30, wore his firefighter suit, dress shirt and tie.
"I couldn't have asked for a more memorable and incredible wedding day. Watching her walk down the aisle as I took her hand in marriage was one of the most significant moments in my life," Jason told The Sun.
"I have finally found my person, the one who I want to spend the rest of my life with."
And Roxanne gushed she was "floating on a cloud" on their big day, and the feeling lasted for a while afterwards.
"To walk down the aisle in such a perfect fairy-tale setting towards my dream man, was the happiest moment of my life," Roxanne said.
Roxanne reportedly walked down the aisle holding a single white rose as "The Prayer" by Andrea Bocelli and Celine Dion played in the church.
The groomsmen and bridesmaids all wore black for the wedding.
Jason got engaged to Roxanne -- who has appeared on several U.K. reality series including Celebrity Big Brother -- in December 2019, only 10 months after divorcing Cortney Hendrix, whom he wed in 2014 on Married at First Sight.
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Jason gushed about his new fiancee on Instagram at the time, "When I said you're the love of my life I truly mean that."
"You get me more than anyone ever has and ever will," he added. "I know that my mom is looking down on us smiling because she knows that her son has someone I can truly call family."
Jason met Roxanne in Brooklyn, NY, when Roxanne exited a taxi and seemed to be lost, the U.K.'s Daily Mirror reported.
According to insiders, the pair reportedly felt "love at first sight" and decided to grab coffee together -- an outing which turned into a week-long date.
Reports Jason and Roxanne were dating first surfaced in August 2019, when Roxanne confirmed their romance on Instagram.
The Sun reported Roxanne and Jason began dating seven months after she was dumped by her fiance Lee Walton. She was then apparently living with Jason and his roommate in New York City by August.
Jason moved on with Roxanne after being married to Cortney for five years after they tied the knot as strangers on Married at First Sight.
Jason and Cortney quietly filed for divorce in February 2019 following a six-month separation.
Cortney had initially announced the divorce and explained she and Jason wanted to "move on in different paths" but the makeup artist still had love for her ex and would always have "a special place in [her] heart" for him.
"We asked for privacy this entire time bc we were trying to figure it all out. At one point we thought we were going to divorce in order to date and start all over the right way," Cortney continued.
"We have decided together to move on in different paths, but that doesn't mean we don't have love for each other. He will always have a special place in my heart and life."
Jason subsequently told People in a March 2019 statement he and Cortney had decided to separate "with a heart full of sadness."
"We fell deeply in love, and had very much a fairytale story being married as complete strangers in the docu-series, Married at First Sight," Jason said.
"We both had such an incredibly magical journey together these past few years, making this that much harder to write and even harder to live. These last few months, we asked for privacy to reevaluate things. It has been a very difficult time for me especially with all the rumors, as well as the public wanting updates about our marriage."
Jason therefore thanked fans for respecting the former couple's privacy, especially in light of the fact he and Cortney had fallen in love on television.
"Although we've decided to go our separate ways, we continue to love and support one another and still share a common goal to remain friends," Jason added at the time.
"I think the best way I could summarize how I feel is through a quote that has stayed with me for some time by Joseph Campell, 'We must be willing to let go of the life we've planned, so as to have the life that is waiting for us.'"
During their Married at First Sight season, Cortney found it difficult to be married to a firefighter and Jason was dealing with his mother's failing health.
However, the couple decided to stay together at the end of the experiment on "Decision Day."
Jason and Cortney later starred on Married at First Sight: The First Year, along with fellow Season 1 lovebirds Jamie Otis and Doug Hehner, who are still happily married and expecting their second child together.