The 28-year old and her husband Ryan Dorsey, 32, welcomed their son on September 17.
His name? Josey Hollis Dorsey.
It's giving us Never Been Kissed flashbacks - but we kind of like it.
The pair, who married in Mexico last year, are reported to be natural parents.
We wish them all the best - and we can't wait to see what little Josey looks like.
What do you think of Rivera's baby name?
TAP on the image below and scroll through the gallery to see more photos of Rivera and her pregnancy style…