Stan Lee, writer, editor, and publisher of Marvel Comics, has died at age 95.

It's a sad day for Marvel fans. Stan Lee, the man behind iconic Marvel Comics characters like Spider-Man, the X-Men, Thor, Black Panther, Iron Man, and the Fantastic Four, has died. He was 95.

Several media outlets have reported that Lee was taken to Cedars Sinai Medical Center in L.A. on Monday after suffering a medical emergency. He was declared dead shortly afterward.

Lee entered the comic book business in 1939 and helped co-create countless beloved characters in the Marvel Comics universe (with the late Jack Kirby). In the later years of his life, Lee made numerous memorable cameo appearances in Marvel-related film and television projects, as well as writing and producing credits in the works. It's been noted that he filmed a number of cameos with Avengers directors Joe and Anthony Russo prior to his death, so it's not clear when his final film appearance will be.

Lee is survived by his daughter, J.C., and younger brother, Larry Lieber. His wife, Joan, passed away in 2017.

We'll miss you, Stan Lee. And thank you.