One of the stars of the YouTube family vlog channel Bratayley who later signed with Disney's Maker Studios. She plays the character Harmony on the web series Chicken Girls and has also appeared in the web series Mani. In 2018, she began starring on the Brat web series Hotel Du Loone.
The Bratayley channel was initially created for her. Bratayley is a combination of Brat and Hayley.
She appeared with her brother Caleb and sister Annie on another channel called OMMyGoshTV. She has over 2.8 million followers on her hayley.leblanc Instagram account as well as more than 3.9 million fans on her superhayley musical.ly account.