And, there are some new faces to look forward to. Among the newbies are Jemima Kirke, playing new headmistress Hope, Dua Saleh, who will play new student Cal, and Harry Potter star Jason Isaacs, who will undertake the role of Peter Groff, Adam's uncle.
But before we get stuck into an eight-hour binge when the new episodes drop on Friday, let's take a look back at some the main cast early careers, and they look so different!
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WATCH: Netflix's Sex Education makes big season three announcement
Aimee Lou Wood
Before Aimee Lou Wood appeared as Aimee Gibbs in the first season, the actress was working in the theatre.
The RADA graduate appeared in productions at the Almeida Theatre and in the show, Downstate, which showed at the Steppenwolf Upstairs Theatre in Chicago and at the Royal National in London.
Since Sex Education, she's gone on to land parts in the film Hen and Living, which is due for release next year.
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Ncuti plays the loveable Eric in the show. The 28-year-old actor's role in Sex Education made him a breakout star and he won a number of awards for his performance including best Comedy Performance at the Royal Television Society Awards and for Best Actor in Television at BAFTA Scotland.
However, prior to the show, he had credits in the TV shows, Bob Servant and Stonemouth, and appeared in Horrible Histories: The Movie.
Emma plays the feisty and too-cool-for-school, Maeve Wiley. Like Ncuti, Emma's role in the Netflix show garnered her plenty of attention and acclaim. Before playing the part of Maeve, she had appeared in the TV film, Badger Lane and Summit Fever.
However, since Sex Education she has gone on to land more roles. Next year, she'll appear in highly-anticipated movie Death on the Nile, among an ensemble cast.
Jackson Marchetti is the school "jock", head boy and school heartthrob played by Kedar Williams-Stirling.
Kedar studied at the prestigious Sylvia Young Theatre and went on to appear in films such as Shank,You are Me and Changeland. He's also enjoyed parts in TV shows such as The Bill, Silent Witness and Wolfblood.
Gillian Anderson is a fan-favourite on the show but her portrayal as sex therapist Dr Jean Millburn won't be the first performance viewers would have seen her in. Gillian hit the big time when she played the part of Dana Scully in The X Files but has gone on to star in many more productions.
She's known for appearing in fellow Netflix hit, The Crown, as well as The Fall, The Great and War & Peace.
Simone Ashley plays Olivia in the comedy and it seems her performance impressed bosses at Netflix, as she was then cast to appear in the upcoming season two of Bridgerton as Kate Sharma. Prior to joining Sex Education, however, she had appeared in Wolfblood, Broadchurch, Strike and Casualty.
Connor Swindells plays Adam Groff, former high school bully and son of headmaster, Mr Groff.
TV fans may have spotted Connor popping up in BBC's current primetime drama, Vigil, but prior to joining Sex Education, he was known for his small parts in TV shows like Harlots and Jamestown.
Like her co-star Gillian Anderson, Anne-Marie Duff joined the show as one of the more experienced actors in the cast and plays the part of Maeve's mother.
Viewers will recognise her for her role in cult comedy Shameless, as well as His Dark Materials and Nowhere Boy.
Tanya Reynolds plays Lily in Sex Education, but her first TV role was opposite Dawn French and Emilia Fox in Sky One drama, Delicious. She's also appeared in Outlander,Rellik and Death in Paradise.
Patricia Allison plays Ola Nyman, who briefly enjoys a romance with Otis in the second series, before moving on to date Lily (Tanya Reynolds).
Like her castmates, Patricia's big break came from the Netflix show, but she did appear in the TV adaptation of Les Miserables and BBC series Moving On.
Ruby is one of the most popular girls at Moordale high school and is played by Mimi Keene. Soap fans will recognise her from her part as Cindy in EastEnders. She's also appeared in Casualty, Our Girl and the film, Close.
Chaneil is best known for playing Anwar, leader of the Untouchables clique in the Netflix show, but his previous credits include Informer and Doctors. He also appeared in BBC drama Black Narcissus in 2020.