Gervais and Blunt set for 'Muppets' cameos

Ricky Gervais and Emily Blunt have signed up for cameo roles in the forthcoming 'Muppets' movie.

The British stars will appear alongside a Hollywood-heavy cast including Jack Black, Jean-Claude Van Damme, Zack Galifinakis and Billy Crystal in the James Bobin-directed project, which sees Kermit, Miss Piggy and co putting on a show in order to help save their movie studio from an evil developer who wants to destroy it.