Euros Lyn directed the first two Heartstopper series before Heartstopper Forever.
Lyn directed all eight episodes of the first series, which premiered on Netflix on 22 April 2022, and all eight episodes of the second, released on 3 August 2023. His consistent direction helped give the adaptation its recognizable visual language, balancing intimate conversations with the colorful, comic-inspired overlays associated with the show.
Heartstopper was created and written by Alice Oseman from her graphic novels, while See-Saw Films produced the television adaptation for Netflix. Lyn also served as an executive producer, making him more than a director-for-hire during the show's early development.
A common mix-up is Andy Newbery, who directed the third series rather than the first two. Heartstopper Forever is the feature-length conclusion, so the question's reference distinguishes Lyn's work on the original television chapters from the later continuation.