The title character and "star" of the comic. Heart is a precocious girl whose adorably energetic presence attracts everyone around her. She loves dressing up and playing with her "Karlie and Ben" dolls, and dreaming of the day she can finally get her ears pierced. Heart's primary characteristic is her obsession with all things Hollywood and celebrity fads. Her main goal in life is to be a mega-star before hitting the teenage years, a goal she has attempted to act upon many times over the course of the strip yet is continuously thwarted by the combined forces of reality and her mother. In the later strips, she is completely obsessed with new fads such as new media and Jonas Brothers, who made an (unofficial) appearance in the May 7, 2008 strip.

She Is Voiced By Ashlyn Madden.