Jill Michelle Dillard (née Duggar) is an American author and former television personality. She is known for her appearances on TLC as part of the reality television shows 19 Kids and Counting (2008-2015) and Counting On (2015-2017), and in the 2023 Amazon Prime docuseries Shiny Happy People, about her upbringing within Bill Gothard's financially and sexually exploitative Institute in Basic Life Principles (IBLP) and Advanced Training Institute (ATI) organizations, for which her parents were important proselytizers.