Three seasons of *Heartstopper* aired before *Heartstopper Forever*.
The Netflix adaptation began with its first season in 2022 and continued with a second season in 2023 and a third in 2024. The feature-length finale follows those three completed seasons, so it is not a fourth season even though it continues the same characters and overarching story.
The season count is important because the production originally developed with the possibility of a longer television run. Instead, the story’s conclusion was shaped as a film, allowing the creators to finish Nick Nelson and Charlie Spring’s relationship in a single feature-length installment.
A common mistake is to count *Heartstopper Forever* as Season 4. It is better understood as the series finale film after Season 3. The show’s episodes, seasons, and finale film therefore form separate parts of the adaptation’s release history.