Heidi D'Amelio is an American influencer and social media personality. She is the wife of Marc D'Amelio and the mother of Charli and Dixie D'Amelio. In 2021, Heidi starred in the Hulu docuseries The D'Amelio Show.

Heidi D'Amelio was born on January 4, 1972, to her parents. Later in her teen years, she met and married Marc in 2000 and a year later had their eldest daughter, Dixie. Later in 2004, the pair had another daughter, Charli, and the four lived in Norfolk, Connecticut.

Her maiden name is O'Brian and she's from Lafayette, Louisiana. She has appeared on the social feeds of her daughters Charli and Dixie. She married Marc D'Amelio on May 13, 2000.