From Wolverine to Spider-Man, Black Panther to the Fantastic Four, not many people will forget the world Stan Lee constructed and has subsequently left behind.
The Marvel creator died at the age of 95, but his legacy will continue to live on. Even though his career started with simple pen and paper, it has grown into so much more.
As the Marvel Universe expanded with more characters and storylines, it also reached new platforms with the launch of the Marvel Cinematic Universe in 2008 with Iron Man. Nineteen films later (with more coming), it has helped to introduce many people to Lee's world – one in which superheroes exists and good can triumph over evil.
Lee should also be credited with propelling the careers of Hollywood stars Chris Evans (Captain America), Hugh Jackman (Wolverine) and Chris Hemsworth (Thor), while also helping revive those of Robert Downey Jr (Iron Man) and Evangeline Lilly (The Wasp).
As the world mourns the loss of Lee, here are some of the touching tributes that have come from fans on social media:
Those who worked closely with Lee as part of the MCU also took to Twitter and Instagram to share their thoughts.
Chris Evans who played Captain America wrote:
Robert Downey Jr, who kicked off the MCU as Iron Man, posted a photo of the two of them together:
Ryan Reynolds, who portrays Deadpool, posted:
Hugh Jackman, who successfully played Wolverine in a number of X-Men films and has made three stand-alone origin films, wrote:
Josh Brolin, who played Thanos in Avengers: Infinity War and Cable in Deadpool 2, also took to Instagram:
And Samuel L Jackson (who has been seen in many Marvel films as Nick Fury) posted on Twitter:
It's clear that Lee's impact on Hollywood and beyond is something that won't be forgotten any time soon.