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Netflix's Heartstopper Season 3 Cast Guide: Who are the new characters?

The third season of Heartstopper on Netflix will not only continue to explore the heartfelt journeys of Nick and Charlie but will also introduce several intriguing characters that will enrich the narrative. Check out the cast guide.

Darragh Hand, Eddie Marsan and Jonathan Bailey in Heartstopper, Season 3.
© IMDbDarragh Hand, Eddie Marsan and Jonathan Bailey in Heartstopper, Season 3.

With the third season of Heartstopper just around the corner, fans are eager to meet the new faces joining the beloved cast, which will once again feature Kit Connor and Joe Locke (Agatha All Along) as the main protagonists.

Several top-tier stars, such as Jonathan Bailey, have joined the project to portray new characters that promise to enrich the storyline, tackling themes of relationships, self-discovery and the nuances of adolescence.

The series will premiere the new episodes on October 3rd in Netflix‘s catalog, and it seems to have a bright future ahead, especially with a possible fourth season on the horizon. Here, check out the cast guide…

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All new Heartstopper characters for Season 3

Diane (played by Hayley Atwell) | Nick’s aunt, who takes him on a summer holiday to Menorca and offers relationship advice regarding his bond with Charlie. The character aims to add depth to Nick’s storyline.

Geoff (played by Eddie Marsan) | He is Charlie’s therapist, characterized as wise and straightforward. His character adds an important dimension to the mental health aspects of the storyline, emphasizing the importance of seeking help.

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Jack Maddox (played by Jonathan Bailey) | He is described as an Instagram-famous classicist and becomes a celebrity crush for Charlie. He will likely add an interesting dynamic, exploring themes of admiration and celebrity culture.

Michael Holden (played by Darragh Hand) | He is introduced as a love interest for Tori, Charlie’s older sister. Michael’s character is part of the expansion of the story as it explores the complexities of young love.

Clara (played by Lara Decaro) | She is introduced as Charlie’s cousin. She’s expected to interact with the main cast, enriching the storyline by exploring family relationships and connections.

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Ariadna is a multisport journalist specialized in delivering key, high-value information across competitions, including tournament formats, rules, lineups and injury updates, while also producing evergreen content. Her career in journalism began in 2021 at Indie Emergente, a digital music magazine, where she honed her skills in writing and reporting. In 2023, she expanded her expertise by contributing to Spoiler Latinoamerica, creating general culture content, before joining Spoiler US in 2024 to focus on entertainment coverage. With almost six years of experience across different media outlets, Ariadna has developed strong expertise at the intersection of sports and entertainment, covering live events such as Super Bowls, FIFA World Cup opening and closing ceremonies, Olympic Games and UEFA Champions League finals, bringing depth, accuracy and real-time insight to her reporting.

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