The actor said on Thursday that he has been rehearsing for The Music Man for over a year after the play was delayed due to the COVID-19 pandemic. Colbert presented a clip of Jackman practicing tap dancing for the show.
"It's been a year and a half we have been rehearsing for this. It certainly takes me a lot longer. I'm not like a trained dancer. I wasn't a trained singer," Jackman said before joking that he is just pretending when onstage.
"I've learned as an adult so I have to do that all the time. I sing everyday. I have singing lessons every week. I'm literally faking it all," he continued.
Jackman and Colbert teamed up to sing "Pick a Little - Talk a Little/ Goodnight Ladies" from The Music Man before Jackman gave a brief solo performance of the musical's opening.
The Music Man will open Dec. 20 on Broadway.
Jackman also discussed his dream roles with Colbert.