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Len Wein (born June 12, 1948; died September 10, 2017) was a writer on X-Men, Iron Man, Spider-Man, The Incredible Hulk, The Avengers: United They Stand, and The Super Hero Squad Show as well as being credited as character creator on Spider-Man and His Amazing Friends, X-Men, Spider-Man, X-Men: Evolution, Next Avengers: Heroes of Tomorrow, Hulk vs Wolverine, Marvel Anime: Wolverine, and Ultimate Spider-Man.
During his time at Marvel he was known as Lively Len.
He was a well known comic book write who worked for Marvel Comics and DC Comics. He is most well known for creating Swamp Thing for DC and Wolverine for Marvel. He was co-creator of Nightcrawler, Storm, and Colossus. He and Alan Moore created the influential miniseries Watchmen. For DC he had worked on titles including Action Comics, Batman, Blue Beetle, Crisis on Infinite Earths, Deathstroke, The Flash, Green Lantern, Jonah Hex, Justice League of America, Mister Miracle, The Shadow, Star Trek, Supergirl, Superman, Superman/Batman, and Teen Titans. For Marvel he worked on titles including 2099 Unlimited, Conan the Barbarian, Daredevil, The Defenders, Fantastic Four, Giant Size X-Men, The Incredible Hulk, Iron Man, Power Man, Thor, Ultraforce, Werewolf by Night, and X-Men.
He has also written for other series including The Transformers, Exosquad, Conan and the Young Warriors, Batman: The Animated Series, Phantom 2040, Street Fighter: The Animated Series, ReBoot, Mummies Alive!, Beast Wars: Transformers, Pocket Dragon Adventures, War Planets, Godzilla: The Series, RoboCop: Alpha Commando, Beast Machines: Transformers, Kong: The Animated Series, Ben 10: Alien Force, and Beware the Batman.
He is credited as the creator of characters for films and series including Swamp Thing, Human Target, Spider-Man and the X-Men: Arcade's Revenge, The New Batman Adventures, Tony Hawk's Pro Skater 3, X-Men, X-Men: Next Dimension, Justice League, Batman Begins, Teen Titans, Justice League Unlimited, Spider-Woman, Agent of S.W.O.R.D., Smallville, Human Target, Marvel vs. Capcom 3: Fate of Two Worlds, The Dark Knight, X-Men: First Class, Justice League: Doom, Young Justice, Lego Marvel Super Heroes, The Dark Knight Rises, X-Men: Days of Future Past, Batman: Assault on Arkham, Batman: Arkham Knight, Justice League: Gods and Monsters, Batman: Bad Blood, Deadpool, DC Super Hero Girls: Super Hero High, Suicide Squad, Justice League vs. Teen Titans, Luke Cage, Justice League Action, Justice League Dark, Logan, Gotham, Batman and Harley Quinn, and Batman: The Enemy Within.
He also acted in The Laughing Dead, Caper, X-Men: Days of Future Past, and Savageland.
He has been given special thanks for works including Batman v Superman: Dawn of Justice, Daredevil, Luke Cage, Doctor Strange, Logan, and Wonder Woman.
He was inducted into the Will Eisner Comic Book Hall of Fame in 2008.
Wein died on September 10th, 2017 following an extended hospital stay. He was sixty-nine years-old and survived by his wife Christine Valada along with several children.