The 43-year-old Cena started dating the 29-year-old Shariatzadeh in 2019, after his high-profile spilt with WWE Diva Nikki Bella in 2018.
Cena and Shariatzadeh got engaged in secret and filed for a marriage certificate in early October, with the ceremony held in Tampa,Florida on October 12, via TMZ.
Cena was previously married to Elizabeth Huberdeau from July 2009 until they split in May 2012, with the divorce finalized in July.
He started dating WWE Diva Nikki Bella later in 2012, with Cena popping the question to her at WrestleMania 33 in April 2017.
However the couple called off their engagement in April 2018, less than a month before they were slated to be married in May 2018.
Cena and Bella reportedly split because she wanted to have kids and Cena didn't, with Bella giving birth to her first child Matteo Artemovich Chigvintsev with boyfriend Artem Chigvintsev.
Cena and Shariatzadeh seemingly got serious fairly quickly into their relationship as they're often spotted kissing in public.
Shariatzadeh was born in Iran but was raised in Canada and is a Canadian citizen, working as a product manager for a tech company in Vancouver.
Cena hasn't publicly said anything about the nuptials at this time, nor has Shariatzadeh.
The wrestler and actor recently appeared on The Tonight Show Starring Jimmy Fallon to promote his new children's book, Elbow Grease.
The book was published on October 9, which, 'illustrates the importance of believing in yourself and never giving up.'
Cena has a number of projects in the works, including the new Fast & Furious installment F9 as Jakob Toretto, the brother of Vin Diesel's Dominic Toretto.
He also plays The Peacemaker in another highly-anticipated sequel, The Suicide Squad, also arriving next year.
He also stars in Vacation Friends with Meredith Hagner and Lil Rel Howrey, and The Janson Directive based on the Robert Luldlum novel.
© Associated Newspapers Ltd.