star has apologised to fans of the show when .
From 2008 until 2010 Blake played Neil Sutherland on three seasons of the , as well as its two movies.
Now the actor, 37, has posted snaps on with former co-stars Simon Bird, Joe Thomas and James Buckley 15 years after the show first hit screens.
‘A little show I did is 15 years old today,’ he captioned the post.
‘First episode aired 1 May 2008. Sorry for making you feel old!’
Despite his apology, fans instead thanked him for being they loved.
‘Greatest show in history. I will make sure generations of my kids watch this masterpiece. Just did my third rewatch recently,’ one person posted on Twitter.
‘And every episode is still as funny as it was the first time. Absolute classic of a series,’ someone else said.
Another added: ‘Laughter is the greatest medicine. Must have watched every episode and film a minimum of 20 times since. Genius right from episode one.’
The series, which was created by Damon Beesley and Iain Morris, also spawned two spinoff movies, 2011’s Malia-set The Inbetweeners Movie and a sequel, set in Australia, in 2014.
In the years since the show ended, Blake has gone on to appear in A Very English Scan**l, The Great, Doctor Who and I Hate Suzie.
While his character was at the centre of many memorable moments, two years ago he revealed Neil’s were the ‘bane’ of his life.
While they used to help attract female attention, he said they now just lead people to film him.
‘I might have got a couple of snogs off the back of a few dance moves in my time,’ he said.
‘For me, it was always, hit the dance floor as much as possible with good tunes, break out a few decent moves and see if anyone is magnetised to the moves. Then Inbetweeners comes along, I use it, and then I’ve never been able to dance again. It’s the bane of my life.’
‘Now whenever I’m at a wedding, if I go even near the dance floor, you see guests pulling their phones out to try and film you. And you’re like, “Ah, I can’t do it now”.’
Around the same time the actor admitted he was also surprised people still tuned in years later and that he was unable to comprehend its success.
‘You’d be amazed at how young some kids are when they do watch it,’ he explained, revealing some parents are allowing their nine-year-olds to tune in,’ he explained.
‘People come up to me, “He loves the show.” I’m like, “How old is he?”’ “He’s nine”.’
Blake then joked he was shocked at the revelation and questioned their parenting decisions.
The Inbetweeners is streaming on All4.