Nicki Minaj has official been cuffed up by her ex-convict high school sweetheart and she let her fans know via social media by revealing her name change.
The Queen MC made the big announcement Monday evening, telling her 106 million followers that her new name is "Onika Tanya Maraj-Petty" ... taking the last name of her new boo, Kenneth Petty ... whom she's been with since at least late last year.
Nicki also posted footage from what appears to be the day they tied the knot ... "10.21.19." In the video that she posted, NM shows off custom bride and groom caps and mugs -- it would seem she and Ken had themselves a party ... this might've been the aftermath.