Gervais and Stephen Merchant's follow-up to the international hits Extras and The Office has been described as a "naturalist observational comedy" which follows the life of dwarf actor Warwick Davis.
BBC Comedy has now confirmed rumours that Depp and Sting will appear in the series and also revealed that The Office star Carell will make an appearance
Popstar Sophie Ellis-Bextor announced on Twitter this week that she is filming some scenes for the sitcom.
Gervais and Merchant will also appear on-screen in minor roles throughout the series.
Yesterday, the BBC released a teaser video for the show featuring Extras stars Shaun Williamson, Les Dennis and Keith Chegwin.
Watch the teaser video for Life's Too Short below: