Josh Gad Had a Karate Kid Moment at Opening Night of Gutenberg! The Musical

Josh Gad stopped by Late Night With Seth Meyers October 17 to chat about the new Broadway show Gutenberg! The Musical! but ending up spending most of his time talking about what happens backstage.

Gad stars in the two-hander alongside his original Book of Mormon costar Andrew Rannells. He told Meyers that they have adjoining dressing rooms and he warms up with '80s pop songs like "Take On Me" while Rannells warms up with a Sondheim song. (Can we get that mashup, please?)

READ: See Josh Gad and Andrew Rannells Recreate Their 'Take on Me' Performance With Jimmy Fallon 11 Years Later

The Gutenberg! star also talked about opening night of the musical. It was the first time his daughters have ever seen him perform live on stage and one was waving at him the entire time from the audience while the other was crying, because she could hear his voice starting to go. Gad was fighting off a sinus infection, but Broadway vocal coach Liz Caplan was in the audience, so she came backstage, "and literally does a Mr. Miyagi...and suddenly I could sing again." Hear Gad tell the whole story in the clip above.

Gutenberg! The Musical!, penned by Tony nominees Anthony King and Scott Brown, opened on Broadway October 12 after beginning previews September 15.

Tony winner Alex Timbers directs the Broadway premiere, which is set for a limited engagement through January 28, 2024 at the James Earl Jones Theatre. Gutenberg! follows Gad and Rannells as Bud and Doug, two guys who have written a musical about Johannes Gutenberg, the inventor of the printing press. Convinced their show is ready for Broadway, they are holding a backers' performance in which they play all the parts, aided by hundreds of baseball caps adorned by character names.