Hanna Heckt, born in 2015, developed an early interest in acting through her older sister, who worked as a child model. After her first appearance in a commercial, she made her acting debut with a small episodic role in the series "Nachricht von Mama" ("Message From Mom," 2021). She later appeared in guest roles on "Notruf Hafenkante" (2023) and "2 Minuten" (2024). In 2024 and 2025 respectively, Heckt played the bigger role of a girl whose parents vanish without a trace during an outing in two episodes of the "Frühling" film series, which follows the daily life of a village aide (Simone Thomalla).

Her first lead role in cinema came with Mascha Schilinski's award-winning generational drama "In die Sonne schauen" ("Sound of Falling," 2025), a part that required her to learn Low German and complete stunt training. Also in 2025, she appeared in the "Tatort" episode "Das jüngste Geißlein" in a leading role as a mute girl whose father is presumed murdered.