John Lithgow and Miranda Cosgrove play charades with Jimmy Fallon |

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John Lithgow's R-rated charades with Miranda Cosgrove -- WATCH

This would not be allowed on the iCarly webcast!

iCarly star “The Great Miranda Cosgrove” stopped by Late Night with Jimmy Fallon last night to play charades, but received an R-rated surprise from fellow guest John Lithgow, who didn’t quite keep the game PG.

Check out their game of charades below, and find out the answer to the questions: What’s the dirtiest way you can pantomime The Dictator? How uncomfortable can you make a teenage star? 

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Between this and the cast of 30 Rock playing a hilarious round a month ago, charades seems to be Fallon’s best bit as of late. Note to Cosgrove: You did fine. How did Fallon not guess War Horse? And Lithgow: No excuses for not guessing Toddlers and Tiaras.

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