But he didn’t do just any look.
Hart donned the now famous 90s look of Johnson in a black turtleneck, gold chain, jeans and a fanny pack.
“This s**t makes me laugh,” Hart wrote in the caption of a photo split of him and Johnson in the outfit. “#NailedIt #HappyHalloween #PeepTheNapkinUnderMyElbow.”
Hart also posted a video of him showing up at Johnson’s house in the outfit to trick or treat.
“I killed it with my Halloween costume this year…,” he wrote in the caption. “@therock had the nerve to get an attitude with me.”
Hart also used it for a little promo, adding “We are dropping a brand new trailer for Jumanji The Next Level tomorrow. Stay tuned!!!!!!”
In the video, Johnson gets his own back, taunting Hart that he won’t give the diminutive star the king-sized candy bars.
“Here’s what you get,” Johnson told Hart. “It’s bite-sized. Tiny, mini, like you.”