The actor played Mr. Music, a character in the special who showed children that music is everywhere.
Another experience similarly convinced the comedian that Gyllenhaal was right for the part.
“I had seen him inSunday in the Park With George, the musical,” Mulaney explained.

Roy Rochlin/Getty Images; Mark Sagliocco/Getty Images for The Headstrong Project
That guy thinks hes theperson.
Hes out of his mind this is great.'"
And when Mulaney finally got to work with the actor, he wasn’t disappointed.
Gyllenhaal got the vibe right away.
“He said, ‘Should I play Caribbean?’
And I was like, ‘Youre a genius.'”
John Mulaney & the Sack Lunch Bunchis currently streaming on Netflix.
Mulaney will behostingSNLthis weekend, with Byrne serving as musical guest.
For Gyllenhaal’s segment onSack Lunch Bunch, watch the video below.