The Boys Presents: Diabolical is an American adult animated superhero miniseries that premiered on Amazon Prime Video on March 4, 2022. It serves as a spin-off of the live action television series The Boys, and is similarly based on the comic book series of the same name by Garth Ennis and Darick Robertson. The series is created by Eric Kripke, Seth Rogen and Evan Goldberg, all executive producers of The Boys television series, alongside Simon Racioppa.

Each episode serves as a stand-alone story set in a separate universe than of the live-action series, with the exception of the final three episodes, which share continuity with the live action series. The tone of the stories vary from comedic to dramatic, and each episode has its own animation style. Writers include Ennis, Racioppa, Rogen, Goldberg, Justin Roiland, Ilana Glazer, Awkwafina, and Andy Samberg; featured voice actors include Antony Starr, Dominique McElligott, Colby Minifie, Chace Crawford, Elisabeth Shue, and Giancarlo Esposito, reprising their roles from the live-action series.

Diabolical received positive reviews from critics, with praise going to the animation, voice acting, writing, humor and themes.