The sitcom focuses on the ironically named Leslie Winner, who, despite his best intentions, forever finds himself in disastrous situations.
The BBC explains: "Leslie Winner is an eternally-optimistic klutz with his heart in the right place. Somehow, despite his calamitous nature, he has found love with his fiancée Jemma and they are preparing for their wedding. The pressure is on Leslie to find, and keep a job, pay for the honeymoon and keep his father-in-law happy, his mum and her new boyfriend happy and hang on to Jemma long enough to walk up the aisle together. Will Leslie be a winner or will his surname continue to be ironic?"
Spencer Jones comments: "Two weeks ago, we were in so much debt that my missus had to hide our car a few streets away from the bailiffs. This week I'm the lead in a BBC One sitcom. Welcome to the entertainment industry. I really hope people like the show because I can't find the car and the missus can't remember where she parked it."
Shaun Williamson says: "I'm delighted to be part of Mister Winner, alongside the brilliant Lucy and Spencer. Leslie is like the son in law I never wanted. I have to keep reminding myself he's not real or I'd never sleep at night."
Chris Sussman, BBC Studios' Head of Comedy and executive producer of Mister Winner, says: "Spencer Jones is a very funny man but a massive liability, and I can't believe we've let him loose around some very expensive production equipment. Let's hope the BBC's insurance premiums are up to date."
For updates, click the button below.