Netflix Starts The Inbetweeners 3 in UK, Reviving a Franchise Last Seen in 2014

Q: Beyond the core four leads, which legendary supporting characters are secretly joining this highly anticipated reunion at Rudge Park?

No additional supporting cast have been officially confirmed for *The Inbetweeners 3* beyond Simon Bird, James Buckley, Blake Harrison and Joe Thomas. The reporting and Netflix’s production announcement name only the core four leads and the returning creators, Damon Beesley and Iain Morris. Multiple outlets explicitly note that no further casting has been announced, and there is no verified confirmation that any “legendary” Rudge Park supporting characters are joining the film at this stage. The only notable name mentioned in the wider coverage is Emily Atack, who played Charlotte Hinchcliffe. Several reports say producers are interested in bringing her back, but her involvement remains unconfirmed. Recent tabloid speculation about her return, and about past tensions with James Buckley, has not been substantiated by Netflix or the filmmakers. Fans may also speculate about other beloved figures such as Mr Gilbert, Carli, or other school-era characters, but there is no official evidence yet that they are in the cast. For now, the only safe answer is that the reunion publicly confirmed so far is the original quartet.

3 articles · Updated · Deadline · Sep 7

Production on The Inbetweeners 3 began in the UK on Sept. 7, with Netflix reviving the comedy franchise more than 12 years after the second film.
All 4 original stars — Simon Bird, James Buckley, Blake Harrison and Joe Thomas — are returning, while creators Damon Beesley and Iain Morris are back to write and direct.
The film extends a series that ran on Channel 4 from 2008 to 2010, then spawned 2 Film4-backed movies released in 2011 and 2014.
That track record helps explain Netflix’s bet: the first movie opened at No. 1 and set what was then a UK comedy record for opening weekend, with the sequel also breaking box-office records.