Cardi B and Offset Secretly Married Last Year

Cardi B and Offset Secretly Married Last Year

TMZ Cardi B and Offset are already married, and documents show they actually tied the knot MONTHS ago -- which explains why he's now calling her his "wife" in public. 

We did some digging and found out they got a marriage certificate in Fulton County, GA on Sept. 20, 2017. For you single folks ... the marriage certificate is filed with the court AFTER a couple does the deed as proof the marriage really happened.

When Migos won Best Group Sunday at the BET Awards, Offset said excitedly, "I thank my wife. You should thank yours."

Cardi B and Offset took spontaneity to a whole new level -- they got married on a whim ... as in, the day he asked her to marry him.

Sources close to the couple tell TMZ ... the Migos rapper woke up one September morning, looked at the "Bodak Yellow" rapper in the eye and straight-up said, "Marry me." She obviously said yes but, believe it or not, that impulse was only the beginning.

We're told, that same day Offset and Cardi -- who at this point, we're told, had no idea she was carrying Offset's child -- hired an officiant to come to the house and marry them in their bedroom. The only person besides the officiant to witness the nuptials was Cardi's cousin. 

It was such a spur-of-the-moment decision, there was obviously no time for an engagement ring, much less a wedding band. That brings us to the "public engagement" back in October. We're told that was NOT Offset proposing to Cardi. It was Offset keeping his promise to Cardi and getting her a ring. As we first reported ... at that point they had been married for at least a month.

As for why Offset ain't flaunting a wedding band ... our sources say he'll get one and wear it once there's an official wedding ceremony, which we're told will happen after Cardi pops.