Josh Hutcherson Wears a Mask at Comic-Con to Blend In and Scare Jennifer Lawrence

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Very few movies have casts with as much real chemistry as The Hunger Games, and when stars Jennifer Lawrence and Josh Hutcherson spend a weekend together having fun with fans and fellow stars, things get predictably adorable.

Speaking with ET at Comic-Con International in San Diego, California on Thursday, the 24-year-old actress revealed that sometimes they need to conceal their identity at the massive fan convention by wearing a mask.

MORE: 17 Things We Learned About The Hunger Games Cast During Their Final Comic-Con Visit

In fact, the 22-year-old Hutcherson even showed off a picture he took of himself standing in front of The Hunger Games booth while rocking a mask and going totally undetected.

But pulling one over on convention-goers wasn't where Hutcherson stopped. No, he wasn't going to be happy until he scared the daylights out of his co-star.

"He burst into my room and scared the life out of me," Lawrence recounted, adding the somewhat gross detail that the mask make Hutcherson super sweaty.

WATCH: Jennifer Lawrence Gets Pranked with Crickets by Mockingjay Co-Star

"I was about to go out the door and we're both going to the same event. I was like, 'Are you going to shower?'" Lawrence said, laughing. "I don't think he did."

Apparently, playing practical jokes on Lawrence is sort of a pastime for her co-stars. Check out the video below to hear about the time she got pranked with a jewelry box filled with crickets.

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