They’re all currently active, mostly have comedy backgrounds, and mostly don’t do touring so scheduling them is probably fairly easy? Plus a lot of the contestants are talked into it through their celeb mates, so once you have one person from a show it’s easier to get their fellow cast members in.
What’s the reasoning behind their obsession with actors from Ghosts?
Big Horrible Histories fans?
They’re all currently active, mostly have comedy backgrounds, and mostly don’t do touring so scheduling them is probably fairly easy? Plus a lot of the contestants are talked into it through their celeb mates, so once you have one person from a show it’s easier to get their fellow cast members in.