Stan Lee, the writer and co-creator of iconic characters including Iron Man, the Fantastic Four, Spider-Man, Daredevil and the X-Men, has died aged 95.

As a writer and editor charged with keeping multiple stories going at the same time, Lee wove them together into a seamless fictional world where Iron Man could join forces with the Fantastic Four, and Captain America could find himself a wedding guest alongside Doctor Strange.

Almost as famous as his Marvel superheroes, Stan Lee was known for bringing complex emotional life to cartoon characters

His daughter, J.C. Lee said, “He felt an obligation to his fans to keep creating,” to Reuters. “He loved his life and he loved what he did for a living. His family loved him and his fans loved him. He was irreplaceable.”

She didn’t mention the cause of death of his dad but the TMZ celebrity news website said an ambulance was called to Lee’s Hollywood Hills home early on Monday, and that he died at Cedars-Sinai Medical Center.

Avengers: Infinity War and Avengers 4 co-director Joe Russo has confirmed according to news that the late Stan Lee has already filmed his Avengers 4 cameo.

As reported by CBR.com, during an interview with BBC Radio Scotland back in April of this year, Russo’s comments should reassure fans that the legendary Stan Lee will indeed appear in Avengers 4.