Stan Lee, creator of popular comic book characters such as Spider-Man, Dr. Strange (with Ditko who passed away earlier this year), Fantastic Four, Hulk, Iron Man, Thor, Silver Surfer and X-Men (alongside Kirby), Daredevil (with  Bill Everett), Black Panther, among others died early Monday morning at Cedars-Sinai Medical Center in Los Angeles. He was 95. 

Thank you @TheRealStanLee #StanLeeForever #everybodyhurts pic.twitter.com/s26tzMKraO

— Vadelate (@vadelate) November 13, 2018

You will be severely missed. Thank you for sharing your creativity with the world. #StanLeeForever pic.twitter.com/3bbEEkng9S

— AlphaLightBearer (@AlfaLightBearer) November 13, 2018

Saddened by the passing of Stan Lee today...Your cameos will be missed, but you will continue to live on within the universe that you have created that have touched us all. From a huge fan, you will truly be missed Stan The Man...#StanLeeForever pic.twitter.com/C3XzjBiCN7

— Justin Louie (@LouieXIIIth) November 13, 2018

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I owe it all to you,,, Rest In Peace Stan... #MCU #Excelsior #legend #rip #stanlee #TeamStark

A post shared by Robert Downey Jr. (@robertdowneyjr) on Nov 12, 2018 at 11:26am PST

Sad, sad day. Rest In Power, Uncle Stan. You have made the world a better place through the power of modern mythology and your love of this messy business of being human... pic.twitter.com/x6yZ6ClNSX

— Mark Ruffalo (@MarkRuffalo) November 12, 2018

We’ve lost a creative genius. Stan Lee was a pioneering force in the superhero universe. I’m proud to have been a small part of his legacy and .... to have helped bring one of his characters to life. #StanLee #Wolverine pic.twitter.com/iOdefi7iYz

— Hugh Jackman (@RealHughJackman) November 12, 2018

There will never be another Stan Lee. For decades he provided both young and old with adventure, escape, comfort, confidence, inspiration, strength, friendship and joy. He exuded love and kindness and will leave an indelible mark on so, so, so many lives. Excelsior!!

— Chris Evans (@ChrisEvans) November 12, 2018

Damn... RIP Stan. Thanks for everything. pic.twitter.com/TMAaDJSOhh

— Ryan Reynolds (@VancityReynolds) November 12, 2018

From childhood to adulthood his comics has the been the most influenceable in my life, growed up reading his comics, still growing up watching his movies. Sir you gave us the the best heroes of the universe. Thank You for the awesome journey. R.I.P✌ RESPECT🙏 #StanLeeForever pic.twitter.com/WJYEoxvv3M

— Subhasis Mahato (@blazebappa) November 13, 2018

thank you for everything #ripstanlee #StanLeeForever pic.twitter.com/j52s2CS7n2

— 66lb82 (@66lb82) November 12, 2018

The galaxy is preparing for a Ravager's Funeral for you Stan #StanLeeForever pic.twitter.com/6jwcV7JhUW

— BeingBodhisattva (@BeingBodhisatva) November 13, 2018

#StanLee
R.I.P. Stan Lee, true #Marvel #StanLeeForever pic.twitter.com/enIZX1bINO

— 🦁Subash🦁 (@Subash3K) November 13, 2018

Saddened to learn about the passing of Stan Lee. From watching Marvel films with friends in college to having the privilege to take on one of his characters in @BlackPanther, Stan’s creative genius sparked my imagination & left me in awe. His legacy will carry on. #StanLeeForever pic.twitter.com/z6FEnv6tLv

— Lupita Nyong'o (@Lupita_Nyongo) November 13, 2018

Stan Lee guest stars on The Simpsons 📺#RestInPeaceStanLee #StanLeeForever pic.twitter.com/zEBoUR52H5

— 90sManiax (@90sManiax) November 12, 2018

A legend,goodbey Stan Lee#StanLeeForever #StanLee #Marvel #marvelcomics pic.twitter.com/vc545VuQKF

— Kamira Naito (@kamira_naito) November 13, 2018

Thank you Mr. Lee. #StanLeeForever #StanLee pic.twitter.com/AQfVonyY2e

— Werner Vogels (@Werner) November 13, 2018

Thank you, Stan Lee, for bringing so much colour and joy to the world with your creations. #RIPStanLee #StanLeeForever pic.twitter.com/bkto0wcMsv

— Immie (@houndtails) November 13, 2018

R.I.P Stan Lee, the lengend, today and always.#StanLeeForever pic.twitter.com/7roDT6XJDg

— Rafaela. (@weird_feelings) November 12, 2018

Prior to his death, Stan Lee had shot his last cameo in the fourth and final installation of the Avengers movie, which plans to release by May, 2019.