The Inbetweeners is a British coming-of-age television sitcom, which originally aired on E4 from 2008 to 2010 and was created and written by Damon Beesley and Iain Morris. The series follows the misadventures of suburban teenager William (Will) McKenzie (Simon Bird) and his friends Simon Cooper (Joe Thomas), Neil Sutherland (Blake Harrison) and Jay Cartwright (James Buckley) at the fictional Rudge Park Comprehensive. The programme involves situations of school life, uncaring school staff, friendship, male bonding, lad culture and adolescent sexuality. Despite receiving an initially lukewarm reception, it has been described as a classic and amongst the most successful British sitcoms of the 21st century.

The programme was nominated for Best Situation Comedy at BAFTA twice, in 2009 and 2010. At the British Academy Television Awards 2010, it won the Audience Award, the only category voted for by the public. In the 2011 British Comedy Awards, the programme also won the award for Outstanding Contribution to British Comedy.

The Inbetweeners Movie was released on 17 August 2011 to box office success, and a sequel followed on 6 August 2014. An American version was broadcast on MTV, but was quickly axed after low ratings and poor critical reception. In October 2025, Morris and Beesley's production company, Fudge Park, signed an agreement with distributor Banijay UK to unlock "the rights and the potential to bring The Inbetweeners back for new audiences across a range of platforms including film, tv and stage."

Damon Beesley and Iain Morris met as producers on Channel 4's The 11 O'Clock Show. Following posts as commissioners at Channel 4, where Morris shepherded Peep Show, the two launched their own company, Bwark Productions, in 2004 and landed their first series with The Inbetweeners. A pilot for the programme was produced in 2006 under the direction of James Bobin titled "Baggy Trousers".

E4 originally aired the first series in May 2008, and Channel 4 also broadcast it in November that year. The second series began screening in the UK on 2 April 2009 and finished on 7 May 2009. A third series was commissioned by E4, commencing on 13 September 2010 and ending on 18 October 2010. The first episode of the third series had the highest-ever audience for an E4 original commission. Following the conclusion of the third series, the cast and crew of the programme indicated that there would be no fourth series as the programme had run its course, but that an Inbetweeners movie would be produced, set some time after the third series and following the cast on a holiday in Malia, Crete, Greece.

For Red Nose Day 2011, the stars of the programme travelled around the UK in the yellow Fiat Cinquecento Hawaii featured in the programme in a special named The Inbetweeners: Rude Road Trip. The aim was to try to find the 50 rudest place names in the country.

In November 2018, it was announced that a special retrospective programme featuring the cast would be aired to mark the 10th anniversary of the programme's first airing in 2008. Titled Fwends Reunited, it was broadcast on 1 January 2019; it was poorly received by critics and fans of the series, leading to James Buckley making a public apology.

In June 2020, the content on its YouTube channel was removed, due to the licensing rights changing owners.