Nearly 30 years later, Hanks was able to recite the entire rap, but luckily he knew the song before the film was made, "The Today Show" reported.
>>Read: No one knows for sure if this photo shows Tom Hanks or Bill Murray
"I actually stole that from my kid's summer camp," Hanks said.
But that wasn't the only nod to his big screen past that Hanks made this week.
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On Monday night's "Late Show," Stephen Colbert appeared as Zoltar, the future-predicting midway game at the center of the "Big" story.
This time Hanks wants to regress from a 60-year-old man in a 30-year-old's body.
He says he heard his hip pop when he tried to re-create the floor piano, "Chopsticks" scene in the clip.
Hanks actually did recently recreate that scene on a British talk show. But there is no word if he did pop his hip when he re-created the scene.