Lauren Ambrose and Michael C. Hall, "Six Feet Under" costars (Photo by Bruce Glikas/FilmMagic)

The theatre is a community. While there may sometimes be competition or infighting, sharing in the joy of this art is a communal experience.

This might be why many great shows aren't afraid to include shoutouts to the themes or stories that inspired them, further immortalizing them onstage—whether it's through the score, the text, or the visuals.

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NEW YORK, NY - JULY 09: Leslie Odom Jr., Phillipa Soo and Ariana DeBose with Lin-Manuel Miranda during their final performance curtain call of 'Hamilton' on Broadway at Richard Rodgers Theatre on July 9, 2016 in New York City. (Photo by Walter McBride/WireImage)

Inspiration can spark from unexpected sources, especially when seen through the eyes of theatre artists.

While it's not uncommon to find Broadway musicals adapted from film and tv shows, some of its most legendary hits were inspired by material that emerged from some of the most unconventional inspirations.

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