Twelve stars are set to enter the house for a new run of the reality show, which will last for three weeks.
Channel 5 won't confirm the line up until the stars enter tonight, so be sure to tune in to see which rumours are true!
Stars in the rumoured line up include X Factor 2012 finalist Rylan Clark, Steps singer Claire Richards and Page 3 model Lacey Banghard.
US reality stars Heidi Montag and Spencer Pratt are apparently set to earn £150,000 each for entering the house, while rock singer Meat Loaf is also rumoured to be taking part.
A number of soap stars are also on the bill, with Neighbours’ Ryan Moloney, Corrie’s Sam Robertson, ex-Eastender EastEnder Gillian Taylforth and Tricia Penrose from Heartbeat all due to enter the house this evening.
Meanwhile this year's CBB house is one of the most luxurious ever, boasting a pool, hot tub and even an igloo 'snug'.
A source said: "This is a first for us, we've never had an igloo before. If a couple of celebrities get steamy they might just melt the ice".
Browse pictures of the rumoured Celebrity Big Brother 2013 housemates below!