Christmas posted numerous photos from her May 28 wedding day Sunday on Instagram.
The pair exchanged vows during a sunset wedding ceremony at the State Railroad Museum in Savannah, GA, E! News reported.
Christmas called her big day "magical" in one caption and wrote in another, "I can't believe I got to marry my best friend. #Final2Forever."
Christmas also dubbed Memphis her "forever man," and gushed in another post that her wedding was "as perfect as [Memphis]."
Meanwhile, Memphis posted on his own Instagram account, "The world watched us meet, become best friends, fall in love and now be married!!!!! Forever has begun!... The tears were rolling!!!"
Alongside a beautiful photo of the couple hand in hand, with Christmas donning a strapless ball gown with a thigh-high split, Memphis wrote that his wedding was "perfect."
"This woman has changed my life forever. She has shown me just how good life can actually be. I love you @christmasabbott," Memphis, looking dapper in a traditional tuxedo, captioned the image.
Memphis and Christmas were both in relationships with other people when they competed on Big Brother: All-Stars, the show's 22nd season that wrapped in October 2020, so neither person acted on the romantic feelings they may have had for each other during the game.
"What excites me most about marrying Christmas is I get to spend the rest of my life with her!" Memphis told E! News in a statement.
"We can continue to build our relationship and grow together. We have so much fun together and we complement each other. When you find something like that, you don't ever want to let that go. She is my forever girl."
And Christmas said she believes that God created Memphis "just for me."
"After meeting him, it became clear to me that God had a plan from the very start," Christmas shared with the website.
"I knew that everything that had happened in my life prepared me to meet him, so when I did, I would know he's my person without a doubt. He is my best friend and my HOME and I get to spend forever with him."
Christmas revealed that she initially wanted to get married in a local courthouse but Memphis suggested they should have a more elaborate, grand event for their nuptials.
"He wanted to have our family and friends celebrate our love and feel the love of that experience," Christmas explained.
"We chatted about a few ideas and then he planned it all! What he created was breathtaking. It's what he does and he is excellent at it. Marrying him is the best blessing, the wedding is a bonus!"
Memphis previously told Us Weekly in December 2020 that he knew around Week 6 there "was something about" Christmas that he wouldn't be able to ignore. That same month, Christmas and Memphis went Instagram official.
"I knew I wanted to spend the rest of my life with her a few weeks into the All Star season of Big Brother," Memphis told E! News.
"Since the first time I saw her years back, I always knew she was supposed to be a part of my life, I just didn't know in what capacity. Once I spent a few weeks with her, I knew exactly."
Dating speculation began to swirl when Christmas and Memphis were photographed hanging out at a Florida bar together in November 2020 and the image circulated on social media.
Prior to Christmas and Memphis sparking a flame, Memphis was reportedly dating Dominique Scalise.
Both individuals are parents, as Christmas shares her three-year-old son Loyal with ex Benjamin Bunn and Memphis shares his seven-year-old son River with his ex-wife Ashley.
Christmas shared last year how she and Memphis bonded over being single parents on Big Brother.
"We have such a unique and fascinating story of how we fell in love and came together," Christmas told E! News at the time.
"It's wild to know Memphis and I fell in love with each other before we even shared a kiss. He's my best friend, twin flame and brings out the best of me everyday."
She added, "We accept each other as we are and love one another for who we are at our core. He's my home."