It's become such a hot topic, that even our most loved celebs are joining the EU referendum debate.
The remain camp, who want Great Britain to stay part of the European Union, includes Harry Potter author J.K. Rowling as well as David and Victoria Beckham.
While Geordie Shore's Vicky Pattison and model Liz Hurley will be voting to leave.
This week, a Yorkshire-based brewery took the campaign to a whole new level, and predicted the outcome of the referendum.
Little Valley Brewery conducted a beer-based exit poll.
They created three beers: In, Out and IDK (I don't know) in a bid to encourage voters to have their say.
Announcing the results of the poll, the brewery revealed that IN has been the best seller at a bar in Leeds. A whopping 68 per cent of people chose IN compared to 32 per cent opting for OUT.
Manchester-based Nip and Tipple also gave drinkers the choice of the three beers, and they sold out of IN.
The official polling station in Leeds, Brudenell Social Club, said the students in the area made a proper effort to ensure the entire cask of IN was emptied.
If this unofficial beer exit poll is anything to go by, it looks like we're staying IN.
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