"SURPRISE! On August 31st, Tyler and I welcomed our sweet son, Jones West Johnson, into the world," the Season 8 The Bachelorette star captioned a series of family photos Wednesday on Instagram.
Emily, 36, continued in her post, "During my surgery, we learned that he was born with Down Syndrome, and while it was certainly a surprise, we have so much peace in God's perfect plan and know Jones is going to be a blessing to our family."
Emily apparently had to wait quite some time before she could take Jones home.
"He was in the NICU for a little over a month and is thankfully now home in all the chaos and we couldn't love him more," Emily shared.
"Thank you to everyone at @levinechildrens for all that you did for our family. Im so happy to finally share the news and can share all the pictures with you guys! He's absolutely the cherry on top!"
In addition to Ricki and Jones, Emily and Tyler -- who got married in June 2014 -- are also parents of son Jennings, 6; son Gibson, 5; son Gatlin, 4; and daughter Magnolia, 2.
Emily's Instagram photos included images of Jones in the hospital and Jones' siblings meeting him for the first time.
"I thank Jesus more and more for you each day sweet boy," Ricki gushed of her baby brother Wednesday on Instagram.
Ricki's father, Ricky, was a race car driver who tragically died in a plane crash in 2004 just before Emily discovered she was pregnant with her first child at age 18. Emily first became a mother when Ricki was born in June 2005.
Many members of Bachelor Nation congratulated Emily on her new baby, including Bachelor in Paradise alums Sarah Herron and Becca Tilley.
"Oh Emily congratulations!!! What a blessing! We can't wait to meet Jones," Sarah wrote.
Becca commented, "He is so precious! Your entire family is so beautiful! So happy for y'all!"
Tenley Molzahn wrote to Emily, "Congratulations! He is an absolute charmer already! Look at your beautiful family!!!"
And Trista Rehn gushed, "Congratulations!!!! Such a beautiful family and such a beautiful boy!! Xoxo."
Before finding her happily-ever-after, Emily competed on Season 15 of The Bachelor, Brad Womack's second edition of the show, and later starred on Season 8 of The Bachelorette.
After rejecting both of his Final 2 bachelorettes on The Bachelor's eleventh edition, Brad fell head over heels for Emily on The Bachelor's fifteenth season when he got a second chance at finding the woman of his dreams on reality TV.