Season 3 of one of Netflix's most popular series is officially back in production.

'Sex Education' cast members Gillian Anderson, Asa Butterfield, Chris Jenks, Connor Swindells, and more showed their prep as they head "back to school."

Jojo Macarri , Chaneil Kular, Tanya Reynolds and Chinenye Ezeudu also pop up.

Kular seemed to be making some kind of mask which is a hint for what's to come in the new episodes.

Not only that but we see Anderson trying on a new big belly at the end of the video.

In the last season of 'Sex Education', it was revealed her character Jean is pregnant.

The hit Netflix series follows a student who, alongside a classmate he has a crush on, sets up a secret sex therapy clinic at school.

His mum is a registered sex therapist and starts offering counselling and advice at his school.

Check out the teaser video for season 3 below.