Heartstopper is a British coming-of-age romantic comedy-drama television series created by Alice Oseman for Netflix. It is based on Oseman's webcomic and graphic novel of the same name. The series primarily tells the story of Charlie Spring (Joe Locke), a gay teen boy who falls in love with classmate Nick (Nicholas) Nelson (Kit Connor), whom he sits next to in his new form. It also explores the lives of their friendship group Tao Xu (William Gao), Elle Argent (Yasmin Finney), Isaac Henderson (Tobie Donovan), Tara Jones (Corinna Brown) and Darcy Olsson (Kizzy Edgell).

The television rights for the series were purchased by See-Saw Films in 2019 and Netflix acquired distribution rights in 2021. Euros Lyn was enlisted as the director. Filming took place from April to June that year, with teasers released throughout the timeframe. Various pre-existing songs were used as the series' soundtrack, in addition to an original score by Adiescar Chase. The cinematography and colour grading were planned ahead to give the series a unique atmosphere, amplified by the use of traditional animation adapted from the source material. For the third season, the director role was handed over to Andy Newbery.

The first season of Heartstopper was released on 22 April 2022, the second on 3 August 2023 and the third on 3 October 2024. The series has received critical acclaim, particularly for its tone, pacing and portrayal of LGBTQ people, with the first season receiving nine nominations and five wins for the inaugural ceremony of the Children's and Family Emmy Awards. It gained instant popularity, being among the top ten most-watched English-language series on Netflix within two days of release. It also increased the popularity of the graphic novels and the songs featured in the series.