Steven T. Seagle (born on March 31, 1965) is an American writer who works in the comic book, television, film, live theater, video game, and animation, industries.

He is best known for his nationally acclaimed[1] graphic novel memoir It's a Bird (Vertigo, May 2004),[2] and as part of his Man of Action Studios (with Duncan Rouleau, Joe Casey and Joe Kelly) which created the animated Cartoon Network series Ben 10 responsible for both Cartoon Network's highest-rated single program and highest rated series premiere.

Seagle is also a founding member of Speak Theater Arts, creators of innovative live stage productions and is a former college instructor having taught at Ball State University, Pasadena City College and Mt. San Antonio College, where he also served as a coach for the Forensics team during many of their national championship seasons.