In the Heights and Hamilton creator Lin-Manuel Miranda stopped by Sunday evening's performance of In the Heights at London's King's Cross Theatre, treating the audience to a heartfelt speech. "It's such a time machine to watch this show," he told the crowd. And having recently seen Part One of Harry Potter and the Cursed Child, he continued, "This is definitely one of my horcruxes."

Check out WhatsOnStage's video of the event below:

For tickets to In the Heights in London, click here.

For tickets to Hamilton on Broadway, click here.