Celebrities react to Marvel creator Stan Lee's death

Stan Lee, who cofounded Marvel with his sidekick Jack Kirby and remained the comic company's figurehead for decades as it turned into the world's biggest movie franchise, died Monday at the age of 95.

News of his death triggered an outpouring of mourning from around Hollywood.

Movies based on Marvel comics — including "Spider-Man," "Iron Man," and "Captain America" — dominate Hollywood. Lee's superheroes, first put on paper decades ago, now permeate the movie industry as billion-dollar franchises.

Here's how some celebrities reacted to his death on Twitter.

"Captain America" actor Chris Evans:

"Deadpool" actor Ryan Reynolds:

"Aquaman" director James Wan:

Director Edgar Wright:

Author Neil Gaiman:

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"Star Wars" actor Mark Hamill:

Mark Ruffalo, who plays The Hulk in the Marvel Cinematic Universe:

"Wolverine" actor Hugh Jackman:

"Venom" and "Guardians of the Galaxy" comics writer Donny Cates:

"Iron Man" actor Robert Downey Jr.:

"The Amazing Spider-Man" actor Tom Holland:

Rival comics company DC:

YouTube star Jake Paul:

KISS founder Gene Simmons:

Comedian-actor Seth Rogen:

Ice-T:

Jimmy Kimmel:

Director Kevin Smith:

Actor Josh Gad:

New York governor Andrew Cuomo:

New York City mayor Bill DeBlasio:

This post has been updated.