"You have no idea how much it means to people that you're here," Miranda told Fallon. "You mean so much to people here and it really means the world that you came down and shown a spotlight on the island."
During "The Tonight Show Starring Jimmy Fallon's" special episode in Puerto Rico, which aired Tuesday, the late-night host joined Miranda and the "Hamilton" cast on stage to perform the musical's hit "The Story of Tonight."
"We're in San Juan, we're outside the 'Hamilton' theater," Fallon said in his intro. "I was gonna go watch the show, but then I thought to myself, 'Why just watch Hamilton when I can actually be in 'Hamilton'?'"
In the performance, Miranda reprised his role as Hamilton and flawlessly performed the tune. However, about a minute into the song, another Hamilton appeared on stage. It was Fallon.
The Hamiltons and the rest of the cast finished the song together, but added a little spin on the ending, as they began to sing and dance to "The Tonight Show" theme song.
Fallon brought his show to the Caribbean Island to shed light on Miranda's work. The three-time Tony winner has brought "Hamilton" to Puerto Rico and put the wig back on to raise money and awareness for those who are still recovering from the devastation of Hurricane Maria.
The Pulitzer Prize-winning musical, which Miranda wrote and created, recently kicked off it's three-week run on the island. All proceeds from the 24 Puerto Rico performances running at the Centro de Bellas Artes Luis A. Ferrè theatre will directly profit The Flamboyan Arts Fund, an initiative co-launched by Miranda that is dedicated to "preserving, amplifying, and sustaining the arts" in Puerto Rico.
Fallon interviewed the "Mary Poppins Returns" star on the Puerto Rico "Hamilton" stage. Miranda expressed his gratitude to Fallon for bringing "The Tonight Show" to the island.
"You have no idea how much it means to people that you're here," he said. "The fact that you are here...you mean so much to people here and it really means the world that you came down and shown a spotlight on the island."
Miranda, who has family that lives in Puerto Rico, recalled while talking with Fallon the panic he experienced when he had trouble getting in contact with his relatives during the natural disaster. The actor pointed out that performing the "Hamilton" song "Hurricane" during the dress rehearsal brought him back to the tragedy.
"I could barely get through it last night," he said. "It sort of brought all that back...Never in a million years imagining [the song] would resonate in this particular way."
"People are so proud," he later added. "People are so happy that this show is coming. I just keep hearing, 'Thank you for everything you've been doing.' It's been so wonderful."
Fallon's trip to Puerto Rico wasn't only about "Hamilton." The late-night host also was able to participate in some exciting activities, including riding the "Monster" zip line and performing "MIA" with Bad Bunny on the streets of Old San Juan. Check them out in the videos below.