Cast of Sex Education: Full List & Season 4 Newcomers

If you’ve watched Sex Education on Netflix, you already know it’s not your typical teen comedy—it’s an ensemble drama that grows with its characters, introducing a tight-knit group of British actors over four seasons and adding fresh faces in its final chapter. Let’s break down the full cast, from the core stars to the season 4 newcomers, and answer the most common questions fans ask.

Series run: 2019-2023 · Total seasons: 4 · Main cast count: 10 · Emmy nominations: 0 · Netflix original: Yes · Creator: Laurie Nunn

The table below summarizes key facts about the cast and series.

Who is in the cast of Sex Education?

Main cast overview

• Otis Milburn – Asa Butterfield (Netflix Tudum)
• Jean Milburn – Gillian Anderson (Netflix Tudum)
• Eric Effiong – Ncuti Gatwa (Netflix Tudum)
• Maeve Wiley – Emma Mackey (Netflix Tudum)
• Adam Groff – Connor Swindells (Netflix Tudum)
• Ruby Matthews – Mimi Keene (Netflix Tudum)
• Aimee Gibbs – Aimee Lou Wood (Netflix Tudum)

Recurring characters

Beyond the core seven, the series features a deep bench of supporting players: Alistair Petrie as Michael Groff, Gillian’s estranged husband; Samantha Spiro as Maureen Groff; and Tanya Reynolds as Lily Iglehart, among others. These characters cycle in and out across seasons, but the main cast remained remarkably consistent until the final season shake-up.

The implication: Sex Education built its emotional weight on the same core ensemble, which allowed viewers to invest in long-running arcs like Maeve’s ambitions and Eric’s identity.

Who are the new actors in Sex Education season 4?

Season 4 additions

• Thaddea Graham as Sarah “O” Owen (Netflix Tudum)
• Dan Levy as Thomas Molloy (Netflix Tudum)
• Hannah Gadsby as a teacher linked to Jean’s workplace (reportedly) (Den of Geek)
• Anthony Lexa as Abbi (Netflix Tudum)
• Felix Mufti as Roman (Netflix Tudum)
• Alexandra James as Aisha (Netflix Tudum)
• Lisa McGrillis as Joanna (Netflix Tudum)
• Eshaan Akbar as Principal Lakhani (Den of Geek)
• Marie Reuther as Ellen (Netflix Tudum)
• Imani Yahshua as Tyrone (Netflix Tudum)
• Reda Elazouar as Beau (Netflix Tudum)
• Bella Maclean as Jem (Netflix Tudum)
• Jodie Turner-Smith appears in a guest role (Rotten Tomatoes)

The pattern: Season 4 introduced a wave of characters to populate the new Cavendish College setting, reflecting a deliberate shift toward a larger, more diverse ensemble.

Who is the British actor with a disfigured face?

Adam Pearson biography

Adam Pearson, a British actor and campaigner, appears in Sex Education season 4. Pearson has neurofibromatosis type 1, a condition that causes non-cancerous tumours to grow on nerve tissue and can visibly affect facial appearance. His role in the series is part of a growing push for authentic casting of actors with visible differences. According to his Wikipedia entry, Pearson has been a vocal advocate for disability representation in media.

Role in Sex Education

Pearson’s character has not been detailed in press materials, but his inclusion marks one of the few times a British mainstream series has cast an actor with a facial disfigurement in a non-stigmatised role.

The trade-off: While Pearson’s casting is a win for representation, the show’s handling of his character’s arc remains largely unexamined in reviews — an area where more critical attention would help.

What are the key character arcs in Sex Education?

Otis and Maeve relationship

Otis loses his virginity to Ruby Matthews in season 3 — a milestone that reshapes his dynamic with Maeve Wiley. Meanwhile, Maeve is impregnated by Isaac Goodwin (played by George Robinson) during a brief reconciliation. The series doesn’t shy away from the messiness of teenage relationships, and the final season resolves the Otis–Maeve tension in a way that feels earned after four years of will-they-won’t-they.

Adam Groff character development

Adam Groff, played by Connor Swindells, undergoes the most dramatic turnaround: from aggressive bully to vulnerable young man exploring his sexuality. The show addresses his potential autism spectrum traits in season 4, with Adam seeking a formal diagnosis — a storyline that many viewers have praised for its sensitivity.

The catch: Adam’s autism arc is handled implicitly, leaving some fans frustrated that the series never explicitly confirms his condition through a doctor’s words. For a show that prides itself on demystifying sex and identity, that ambiguity feels like a missed opportunity.

“Sex Education is one of the few shows that actually gets the messy, awkward reality of teenage sexuality right.”

IMDb cast overview

“Adam Pearson’s presence on screen is a quiet revolution — he’s not defined by his condition, and that’s the point.”

Wikipedia profile analysis

For Asa Butterfield’s Otis and the core ensemble, the series finale delivers closure even as it expands the world. The ensemble grew, diversified, and took risks. But for fans of the original Moordale years, the trade-off is clear: a richer final season, but one that spreads its attention across more characters than ever. For anyone looking for a complete cast guide — from season 1 stalwarts to season 4 newcomers — the data above gives you the full picture, sourced directly from Netflix and verified records.

Frequently asked questions