One of those is Moordale's new headmistress, Hope Haddon, who is played by Jemima Kirke.
Jemima Kirke is a British actress who is known for her role as Jessa Johansson in HBO's hit 2012 series Girls. Prior to that, Jemima played Charlotte in the 2010 indie film Tiny Furniture - both of which were written and directed by her friend, Lena Dunham.
After Headmaster Groff was booted out in the last series, Hope Haddon aims to restore Moordale - her old High School - to its former glory. But will she succeed with this bunch of misfits?
Describing her character in Sex Education, Jemima said on Instagram:
But did you know that Jemima never set out to be an actress? She told Glamour, "it's not something that I set out to do and it is something that I was afraid of at first.
"I was a painter before any of this started and I was very adamant in all my interviews that I'm not an actor. I am an artist," she added.
Jemima Kirke was born in London on 26th April 1985, but then she spent most of her childhood in New York.
Jemima is the daughter of drummer, actor and writer Simon Kirke, who's credited for the soundtracks of Almost Famous, 27 Dresses and The Ice Storm. Her mother, Lorraine Kirke owns a vintage boutique store.
Jemima Kirke married lawyer Michael Mosberg in 2009. They were married for seven years, before divorcing in 2017.
Jemima has two children with Mosberg: a daughter, Rafaella, 11, and son, Memphis, nine.
She told Glamour magazine that she'd let her kids watch Sex Education when they're old enough, and that she hopes it helps them during those tricky teenage years.
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