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Ricky Gervais at Muppets Most Wanted London premiere

24 March 2014 Last updated at 20:32 GMT

Comedian and actor Ricky Gervais has attended the London premiere of Muppets Most Wanted.

The star of the Muppets film told the BBC's Lizo Mzimba it felt "real" talking to Constantine - an evil Russian frog- on set.

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