"We are so excited to share that we will be having a little baby BOY!" Hartsock shared, along with a sweet snap of herself with husband Chris Siegfried and their puppy, Frankie. "Our hearts are so full of love for our little man already and we can't thank you all enough for the extra love you've shared during this special time!"
Hartsock couldn't help but gush about her husband the day before their big announcement.
"The best part about this new chapter in life is going through it all with the quirkiest, most thoughtful, and lovable man I know," she posted to Instagram on Thursday. "We can't wait to be parents to the precious lil soul growing inside me."
Baby Siegfried will be the latest bundle of joy to join the Bachelor family this year.
Former Bachelor contestant Ashley Salter welcomed a baby boy, Brooks, in April. In July, former Bachelor Sean Lowe and his final pick, Catherine, welcomed a son, Samuel, followed by former Bachelorette Ali Fedotowsky's little girl, Molly, a few days later.