Steven T. Seagle is an American writer who works in the comic book, television, film, live theater, video game and animation industries.

His return to comics was on the series Uncanny X-Men, Sandman Mystery Theatre (three Eisner nominations), House of Secrets, Alpha Flight, and Grifter.

Seagle has authored a number of original graphic novels including the Eisner-winning It's a Bird..., and the Eisner nominated The Red Diary/The RE[a]D Diary – both with artist Teddy Kristiansen; two volumes of his Camp Midnight series with the New Yorker cartoonist Jasoon Katzerstein; and GET NAKED a collection of graphic essays illustrated by various artists from The Animation Workshop in Viborg, Denmark where Seagle is an occasional lecturer.

In addition, Seagle and artist Marco Cinello have authored two children's story books; Frankie Stein and Batula.

With Man of Action, Seagle was supervising producer on Ultimate Spider-Man on Disney XD, which premiered in April 2012.

In November 2014, Disney in their first animated collaboration with Marvel Comics premiered Big Hero 6, a film based on the team co-created by Seagle and his Man of Action Entertainment partner Duncan Rouleau.

The same week Seagle also sold and wrote the genre action pilot Carnival to FOX in association with Spelling Entertainment (unproduced), as well as and the female action/comedy Dot’s Bots to Mainframe Animation.

In 2009, Seagle co-directed one of the national premiere live stage readings of The Laramie Project: an Epilogue performed by a celebrity cast and the Gay Men's Chorus of Los Angeles.