"I have just signed up to play the lead in the next Muppet Movie. I have the biggest trailer but Kermit will spend some time in my sink," Gervais tweeted, referring to his famous frog co-star.
Gervais did not say what he will be playing in the family flick, which is due out next year.
"Modern Family" star Ty Burrell is also to appear as an Interpol inspector in the follow-up to 2011's "The Muppets."
Swim Week Miami Beach 2014 [PHOTOS]