Anyway, the British-American filmmaker is now turning his attention to US President Donald Trump...
"The story seems to change every day with Trump. There's something new bubbling under. It's hard to get your head around such a big subject."
He went on: "The challenge with Trump would be... something so abhorrent that walks on two legs and is a human being, you have to explore where his foibles come from."
The documentary is likely to look at the social precursors that led to the billionaire businessman becoming the leader of the free world.
In the lead-up to the presidential election last year, Louis, with all of his awkward charm, expressed his interest in Trump's supporters, telling Australian ABC News: "I think he could win, absolutely,
"I think that he could win because there's Trump supporters out there who aren't even revealing themselves as such, and for me that's an interesting prospect, because I think he'd be a disastrous President."
The documentary, which will explore Trump's rise to power, doesn't have a public release date yet, but will be part of a new, currently untitled three-part series on BBC Two.