Brexit: What's going on?

It's a big day in the debate about how the UK will leave the club of countries called the European Union EU).

Members of Parliament will vote on the deal made by Prime Minister, Theresa May.

She says her agreement with the EU is the best option for the UK but lost of politicians have very different views - including those on her own side.

Here's Ricky to give you the lowdown on what's happening.