Ricky Gervais and Kermit the Frog
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Fey and Gervais join the Muppets

Tina Fey and Ricky Gervais join the cast of The Muppets for their latest film

Actors and comedians Tina Fey and Ricky Gervais have joined the cast of the Muppets for their seventh film.

Fey plays a Russian prison guard called Nadya.

The 2011 Muppets film was a commercial success after it grossed over $165m worldwide.

Ricky Gervais and Tina Fey spoke about their roles in the film.