Emilia Clarke just pulled THE BEST prank on her co-star 

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When she\'s not conquering hostile armies or flying on the backs of dragons,

s star Emilia Clarke can pull a wicked prank.

It turns out that Emilia is constantly messing around on-set, especially when she caught co-stars asleep in between scenes. One victim - the Khal Moro actor Joseph Naufahu - faced her (gleeful) wrath recently.

In the video above, you can see Emilia slyly dumping a caramel dessert all over Joseph while he was catching a few extra winks.

"I had my dessert sitting on the table, and she decided to smear the dessert on me," Naufahu revealed to

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"She put caramel fudge all over my fingers, all over my costume, and she was about to feed it to me, but I woke up. I woke up with a spoon in my mouth."

Other times, she\'d write Dothraki phrases like "Qoy Qoyi" (or "blood of my blood") all over his arms.

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