For Lin-Manuel Miranda, the score forMary Poppins Returnsis practically perfect in every way.

He was accompanied by costars Emily Blunt, Emily Mortimer, and Ben Whishaw.

Can I music-nerd-out for a second?

he asked before pointing it out to his castmates and listeners.

The discovery prompted a brief singalong from Mortimer and Blunt (watch the video above).

Literally, I just heard it for the first time now in hearing the clip, he said.

The score for the originalMary Poppinshas long been a touchstone for the sequels composers.

Im certainly writing in a style that you dont quite hear anymore.

And finally I actuallywasscoring a Mary Poppins movie.

TheMary Poppins Returnscast interview will air on SiriusXMs Entertainment Weekly Radio (ch.

  1. on Wednesday, Dec. 19, at 1 p.m. ET.Mary Poppins Returnsopens Dec. 19.