'Celebrity Big Brother' host Emma Willis

'Celebrity Big Brother' host Emma Willis

'Celebrity Big Brother' is in crisis after the show's date was changed.

The decision - which was ordered by the bosses at Channel 5 - has meant that the show, which was originally meant to finish at the end of January, will now be extended a week until February 6, the Daily Star newspaper reports.

Some celebrities - who have work lined up in early February - are reportedly now telling bosses they can't appear in the show.

The cast of the reality series has yet to be confirmed but Calum Best, 33, 'Geordie Shore's Vicky Pattison, 27, 'The Apprentice's Katie Hopkins, 39 and celebrity gossip blogger Perez Hilton, 36, are some of the rumoured contestants.

Keith Chegwin, 57 is another possible entry - with bookmakers Ladbrokes already making him 5-1 favourite to win the show.

The late departures mean there has been a last-minute rush to fill the spaces with 'X Factor's Chloe Jasmine Whichello, 24, and US reality star Austin Armacost, 26, reportedly in line to step in.

Meanwhile, 'Celebrity Big Brother's host Emma Willis recently teased a "stellar" cast for the upcoming series.

She previously said: "I normally stay very blind to it all right up until the last minute but this year I've actually seen part of a list very early.

"This is going to be one of the best ever series of the show. I have such high hopes for the series - that's how good I think it's going to be. You won't not recognise anybody if it stays like this. This year seems like a proper stellar cast and that's always great to watch."