Hattie Nielsen is the star of her mother Nikki Nielsen's popular Instagram account, where she is often seen posing as a child fashionista. Nikki created the well-known children's blog XO Hugs and Cookies in March 2016, just four months before Hattie was born. Through her engaging content and charming photos, Nikki's self-titled Instagram account has garnered 40,000 followers, making both her and Hattie well-recognized figures in the online community.