Heidi Montag and Spencer Pratt have thrown 'Celebrity Big Brother' into chaos after they made a series of "diva demands" just days before the show's launch.

Spencer Pratt and Heidi Montag

Spencer Pratt and Heidi Montag

The reality TV couple - who first appeared on the programme in 2013 - are just hours away from entering the infamous abode as part of the 'all star' line up but bosses have been left in a panic after they laid down some terms and conditions at the last minute.

A source told The Daily Star newspaper: "We're hours away from launch and now Speidi have thrown a spanner in the works. They're clearly up to their old tricks again."

The showbiz pair - who have been together for eight years - have reportedly demanded that bosses dish them out fish and chips as and when they request it inside the house.

And if the producers don't agree to providing the housemates with greasy grub, Heidi and Spencer have claimed they won't take part in the launch tonight (03.01.17).

The 'all star vs new stars' special, which will see previous outspoken contestants share the colourful abode with first-time celebrities, is set to be the "raunchiest" yet.

A source said recently: "The production team had a meeting about changes they wanted to make to the house. Even the smallest change can make a big difference in how the series will develop. One of the new things this series is that the beds will be smaller. It's a clear indication that they want to see the housemates get close and encourage intimacy. There's a lot of potential for bedroom action this series. It could be the sexiest yet. They will be getting close to each other right from the start."

The official line up is yet to be announced but it's believed former 'Strictly Come Dancing' professional James Jordan, Calum Best, Coleen Nolan, Kim Kardashian West's ex-boyfriend Ray-J and Khloe Kardashian's best friend Malika Haqq are among those who have agreed to take part in the forthcoming series.