Ferrell to appear in 'Born Survivor'?

Will Ferrell will guest in a celebrity edition of Bear Grylls's Born Survivor, say reports.

According to The Sun, the Hollywood star is "in a secret location" shooting an episode of the Channel 4 adventure show.

"The appetite for Bear's shows is massive so producers were looking at ways of making it even more exciting," said a source.

"Normally Bear and his film crew just head out and he shows viewers how to live in the wild. For the next episode he’ll have an A-lister in tow so it will make things extra hard for him."

The insider added: "Not only will he have to endure some pretty horrendous things himself, but he’ll have to convince a pampered celebrity to do it as well."