Sex Education fans have gone wild after discovering that Mr Groff star Alistair Petrie's real life twin sons appeared in series three.
Alistair, 50, plays former headteacher of Moordale Secondary School and viewers have only just realised that his two children — Cal and Brodie Petrie — starred in the latest series.
He also has another son called Angus. The 18 year old twins played students at Moordale Secondary School and fans will recall the duo appearing during the school's infamous coach trip to France in episode five.
Alistair took to Instagram earlier this month to gush about his sons, posting a picture of them during filming, he wrote: "Nepotism at its finest.
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