The bodybuilder-turned-television presenter, 36, stunned fans with the announcement on Wednesday (26 August) as nobody even knew she had been in a relationship.
Jodie said: "I have news. I just married the love of my life, my soul mate, my best friend; James Placido, I love you and I'm so proud to be you wife.
"I promise to love you, support you, encourage you, help you and I promise to make you laugh every day of our lives."
Jodie added a photograph of the newlyweds holding hands, their wedding rings clearly visible.
Fans and friends were quick to send congratulations to the star, including @louize.h wrote said: "I just dropped my iPhone on my face reading this new, omg Jodie, I'm so proud of you, congratulations for finding true love. You deserve it. You're an inspiration to us all xxxxxxx well done."
Another friend (@anitaalbrecht) said: "Jodie's husband is awesome. She has kept it quiet because it's super special to them both - they are utterly fantastic together and Martyn and I are so happy for you both. Congratulations you two. You've got a good one sweetheart. Love and blessings always. Xxx."
Jodie's kept her relationship so quiet there aren't even any pictures of her and James together, although plenty of fans have been begging the star to share photos of their happy day.
In March this year, we spoke to Jodie about her new TLC show Jodie Marsh on… Women Who Pay For Sex, and she told us at the time: "I've been celibate for so long now."
She previously dated ex-TOWIE star Kirk Norcross and Blazin' Squad's Kenzie.