Full Cast of Sex Education Season 4: Every Main Actor & Character In New Netflix Episode

Asa Butterfield as Otis Milburn, a former student sex therapist who tries to start a new sex clinic at his new school, Cavendish Sixth Form College. He is also in a long-distance relationship with Maeve, who is studying in the US

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Emma Mackey as Maeve Wiley, a brilliant and independent girl who left the UK for a gifted and talented program at a prestigious college in the US. She misses Otis and struggles to fit in with her new classmates

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Ncuti Gatwa as Eric Effiong, Otis’s best friend who joins the popular and kind clique at Cavendish. He breaks up with Adam in the third season finale, but still has feelings for him

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Connor Swindells as Adam Groff , the son of the former headmaster of Moordale who has a complicated relationship with Eric. He tries to find his place at Cavendish and deal with his family issues

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Anthony Alexa as Abbi, one of the members of the Coven, the popular clique at Cavendish. He is kind, friendly, and welcoming to Eric

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Aimee Lou Wood as Aimee Gibbs, a sweet and bubbly girl who is part of Otis’s friend group. She suffers from PTSD after being sexually assaulted on a bus in the second season. She is dating Steve, a nice guy who works at a car wash

Alexandra James as Aisha, an American student who is Maeve’s roommate and friend at her college in the US. She is smart, fun, and supportive of Maeve

Kedar Williams-Stirling as Jackson Marchetti, a former swimming champion who quits the sport after injuring himself. He explores his sexuality and identity at Cavendish and becomes friends with Cal, a non-binary student

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Thaddea Graham as O, a mysterious girl who attends Cavendish. She is rebellious and secretive, and has a connection to Otis’s past

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Gillian Anderson as Jean Milburn , Otis’s mother who is a sex therapist and radio host. She has a newborn daughter, Joy, with Jakob, Maeve’s estranged father. She suffers from postpartum depression and struggles to bond with her baby

Felix Mufti as Roman, another member of the Coven. He is charismatic, charming, and flirtatious with Eric

Dan Levy as Thomas Molloy, a cult author who writes erotic novels. He is invited to Cavendish as a guest lecturer and becomes Otis’s mentor

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Lisa McGrillis as Joanna, Otis’s aunt who lives near Cavendish. She is eccentric, quirky, and adventurous. She offers Otis a place to stay when he moves to Cavendish

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