The Incredible Hulk was created by writer Stan Lee and artist Jack Kirby for Marvel Comics, debuting in The Incredible Hulk #1.
The Hulk's grey persona was introduced, showing a more cunning and less powerful version of the character in The Incredible Hulk #324.
The Incredible Hulk appeared as part of the Marvel Cinematic Universe in 'The Avengers' film, portrayed by Edward Norton.
Mark Ruffalo debuted as Bruce Banner/The Hulk in 'The Avengers', becoming the most recognized actor to portray the character.