Starring Simon Bird, Joe Thomas, James Buckley and Blake Harrison, the big-screen spinoff of the hit E4 sitcom sees friends Will, Simon, Jay and Neil jet off for a lads' holiday in Malia, Crete.
Series regulars Emily Head, Belinda Stewart-Wilson and Greg Davies will return for the movie, joined by cast newcomers Lydia Rose Bewley, Laura Haddock, Jessica Knappett and Tamla Kari.
The 66-second teaser ends with Buckley's character Jay delivering the line: "You better bring your wellies because it'll be knee-deep in clunge."
The Inbetweeners creators Damon Beesley and Iain Morris penned the movie, which will be directed by Ben Palmer. The film will open in the UK on August 19.
Watch the teaser trailer for The Inbetweeners below: