She also dropped a hint as to when their little one is due, hashtagging the pic, "#october."
Hartsock starred in season nine of The Bachelorette, which ended with her getting engaged to Siegfried, a mortgage broker, on the season finale. More than a year later, they were married on Jan. 18, 2015. The couple celebrated their one-year anniversary in Maui.
Watch the video below to see how the latest Bachelor star, Ben Higgins, and his fiancee, Lauren Bushnell, are adjusting to life together in Denver, and why all signs point to the two being another Bachelor couple that makes it!