Terry Jones and Gavin Scott
Bill and Ben Productions
The Pythons will be voicing the key roles as a group of aliens who endow an earthling with the power to do "absolutely anything" to see what a mess he'll make of things - which is precisely what happens. There's also a talking dog named Dennis who seems to understand more about the mayhem that ensues than anyone else does.
Dennis the Dog (voice)
Robin has already agreed to voice Dennis the Dog, but the production team is also trying to make him play The Frenchman. So, hopefully, we won't only hear him in this film, but also get to see him.