Big Brother 2013 host Emma Willis has said tonight's launch night twist will be "incredible".
Bosses have been teasing us with #WhatsTheSecret for weeks now, and we're just a few hours away from everything being revealed.
Speaking with just a few hours go go until she's live on stage, Emma said: "It's all very exciting and immensely nerve wrecking this year.
"Not only do I get to do Bit On The Side some nights, I get to to do the live show which is really terrifying but I'm very excited. I've got some flowers and fruit to make me feel calm, but I'd rather have cake."
Tonight is the first half of a "double launch", which continues tomorrow, and Emma teased: "We've got some brilliant new housemates going in and an incredible twist for the start of the show, and a brand new house!"
Emma added: "It's all about recycling, there's electricity that needs to be generated and water that needs to be pumped. They're going to have to work a lot harder than in recent years."
And in one last teaser about this year's housemates, Emma added: "We've got a variety of ages in the house, it's what I want!
Meanwhile, former Big Brother host Davina has wished Emma good luck as the live show approaches.
Davina tweeted Emma, who is taking over from Brian Dowling on the main show, this afternoon to say: "good luck my lovely! You are a perfect fit, and you're going to smash it!!!!! Xxxxxx"
Big Brother 2013 will start on Channel 5 from 9PM tonight.