Little Ensley will be the youngest of five, joining Jenelle's two kids from two previous relationships -- 7-year-old Jace and 2-year-old Kaiser -- as well as David's two children from a previous relationship. The two have been dating since Sept. 2015.
Jenelle's pregnancy has been well documented by the couple, and will also be covered on the upcoming season of Teen Mom 2.
Last week, Jenelle had her baby shower, posting to Instagram, "Thanks to @jamielynnwilshire and @itsashlibee for throwing the best baby shower ever! It's awesome to have such a great group of friends that come from hours away to celebrate my new baby girl's arrival soon! Tonight was great and wouldn't want it any other way. Now the 3 week countdown begins Miss. Ensley! ?? #TheBump #BabyGirl #FriendsAndFamily #BabyEnsley."