As Day's career picked up, so did his drug consumption.
At the peak of his career Day was taking industrial quantities of cocaine and ecstasy, and progressed to crack. Then in the late '90s, he met his wife Ruth, and his road to recovery began.
"I was ready for it. I was in dire straits, and from a selfish point of view, I needed a sensible lifestyle.
"She wasn't into The Fast Show. She didn't know anything about it, so she wasn't an avid fan of mine.
She's very confident in herself, and it seemed to work. We were really comfortable with each other."
Now both stable and clean, he will visit Brighton in a show titled, Simon Day In Character, which will showcase a range of Simon's best loved characters from stage and screen, brought together for the very first time.
The star of BBC's hit TV show Brian Pern: A Life In Rock will be brought to life in a live setting for the first time – a chance to see the aged prog rock star and humanitarian in full effect as he discusses rumours of his death and performs some live songs.
The Fast Show's pub bore and star of 2003 witness protection comedy, Grass, Billy Bleach, will be resurrected and speaking for the first time since being charged with making 278 sexist comments over a three-month period in his local Weatherspoon's.
Geoffrey Allerton, Yorkshire's most under-rated poet, steps out of the Mallard Theatre and onto a stage near you to recite work from his latest poetry collection Making Time.
One of Britain's most dangerous men and longest serving prisoners Tony Beckton talks about his continuous struggle to adapt to life on the outside.
He'll be regaling the audience with stories of his hilarious and violent antics in prisons across the UK.
This will be a fascinating insight into the minds of four very different characters, as they struggle to work out how they fit into a modern world, which has perhaps left them behind.
Simon Day In Character at Komedia Brighton on Thursday 5th October 2017. For info and tickets CLICK HERE.