Derry Girls season 3 has been long-awaited by fans after being delayed but the coronavirus pandemic.
Ian McElhinney, who plays Granda Joe in the show, has spoken about the difficulties the third series has faced.
"We certainly are intended to get back to Derry Girls but the only problem is how long it's going to take," he told The Sun.
"We were supposed to film Derry Girls back in May of last year. And at the moment the talk is that we will probably shoot it in the autumn of this year.
"I know with Derry Girls, one of the stumbling blocks was the number of extras we might need. The amount of what we have to do with extras.
"While you may be able to control the movement of actors and how to kind of isolate them, when you start bringing in extras on any sort of significant scale then you run into issues.
"So, that was certainly one of the things that interrupted our working on Derry Girls at the time."
He added he was also concerned about the ages of the actors in the series.
While they all portray 16-year-old characters, the actors are all at least 27 with Bridgerton star Nicola Coughlan being the oldest at 34.
"That's a long gap and slightly more critical because the girls are 'Derry Girls' and because the girls are far from being girls anymore," he said.
"That doesn't really matter because if you're accepted as a grandad then you can carry on being a grandad. I'm finding whether I like it or not that I've already been a grandad for a few years now it's my reality."
You can catch up with Derry Girls on All4 now, while season 1 is also available to stream on Netflix.
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