Born in North Carolina, raised in Arizona, and currently residing in New York City, Nat Cassidy in an award-winning horror playwright, horror novelist, actor, and musician.

His debut novel, MARY: AN AWAKENING OF TERROR, was published by Tor Nightfire in July 2022 and was named one of the best horror novels of that year by Esquire, Paste Magazine, Harper's Bazaar, CrimeReads, and The Lineup. His follow up novel, NESTLINGS, is due out by Nightfire in October 2023.

As an actor, Nat has guest starred on television shows such as "Law & Order: SVU" (NBC), "Bull" (CBS), "Blue Bloods" (CBS), "FBI" (CBS), "Quantico" (CBS), "The Following" (Fox), "The Affair" (Showtime), "Red Oaks" (Amazon) "High Maintenance" (HBO), "The Last O.G." (TBS), "The Iliza Shlesinger Sketch Show" (Netflix), as well as on stages Off-Broadway, Off-Off-Broadway, and across the country. You can watch him battle giant mutant cockroaches and twentysomething malaise in the horror-comedy film "They Will Outlive Us All," available for streaming on this very site.

As a playwright, Nat is known as "one of New York City's rising playwrights, with numerous productions and awards, critical acclaim, and a reputation for producing intelligent, bold, darkly comic plays with one foot in horror and the other in literary allusion" (Usher Nonsense). He writes thrilling, emotionally compelling horror stories about demons, zombies, Old Gods, ghosts, serial killers, werewolves, cannibals, mutants, and all kinds of ends of the world, and his work has been produced and/or developed at places such as The Kennedy Center, Washington National Opera, Primary Stages, The Flea, and numerous other companies throughout New York City and regionally. His scripts have been published by Samuel French, Broadway Play Publishing, Smith & Kraus, Applause Books, NYTE, and Indie Theatre Now. Nat is an alumnus of Primary Stages' ESPADrills and was commissioned by The Kennedy Center as part of the inaugural American Opera Initiative to write a libretto with composer Scott Perkins, which the Washington Times called "brilliant" and "remarkable." Nat was named one of NYTHEATRE.COM's People of the Year in 2011 and is an inductee in the Indie Theater Hall of Fame.

Nat is also a member of the multimedia production company, Gideon Media, whose hit podcast STEAL THE STARS, was co-produced with Tor Labs (an imprint of Tor Books). Nat played the character of Lloyd in the podcast and also wrote the novelization of Mac Roger's audio scripts, which was published by Tor Books in November 2017 and named one of the best books of the year by NPR.