The 36-year-old former reality star gave birth to a 6 lbs., 12 oz. baby boy early Friday morning (August 5).
Jillian was formally the fifth Bachelorette and was engaged to Ed Swiderski, but the couple broke up in 2010.
Just days before welcoming her new arrival, Jillian took to her Instagram to share a photo of her big baby bump.
“Big bump ahead 😳 #bumpday,” she captioned the sweet image.
Congratulations Jillian and Justin!