It's all fun and games for the 'Hunger Games' co-stars; ET caught up with them at Comic-Con and heard about the hilarious prank Josh pulled on good pal Jen.
Jennifer Lawrence, Josh Hutcherson, and Liam Hemsworth appeared on a special Comic-Con episode of Conan on Thursday to promote Mockingjay - Part 2 -- and let's just say their Cher sing-along was epic!