Finn Jones
On Instagram, the Iron Fist star wrote, "Thank you for your imagination, passion and humor."
Angela Bassett
"Onward and upward to greater glory!" tweeted Basset, who played Ramonda, Queen Mother of Wakanda, in Black Panther. "Excelsior! Good man, Excelsior!"
Clark Gregg
"Stan Lee was a brilliant, kindhearted gent whose stories thrilled me as a kid," he wrote on Instagram. "I was utterly starstruck when I met him and I will never forget that though Phil Coulson was one of the few MCU characters who did not appear in the original comics, he always treated me like one of his own."
Zendaya
"The legend himself. Thank you for all you gave us," the actress, who played MJ in Spider-Man: Homecoming, wrote on Instagram. "I could not be more honored to be a very small piece of your world. Rest in superpower."
Jon Bernthal
"Was an honor my friend. Rest easy. Thanks for letting me play," the actor, who plays The Punisher on Netflix, wrote on Instagram. "Thanks for giving us so much. You will be missed."
Jamie Chung
"RIP Stan Lee. True legend. He spoke up against injustices through his stories; where good prevails over evil," Chung, who plays Blink on Gifted, wrote on Instagram. "It was an honor working for you."
Winston Duke
"Thank you, Stan Lee. You gave us characters that continue to stand the test of time and evolve with our consciousness," the actor, who played M'baku in Black Panther, tweeted. "You taught us that there are no limits to our future as long as we have access to our imagination. Rest in power!"
Jennifer Garner
"You made heroes out of women; I am so grateful to have been one of them," Garner, who played Elektra in Daredevil, wrote on Instagram. "Thank you, Stan Lee. RIP."
Jessica Alba
"Taking a moment to thank the great Stan Lee for his kindness," the actress wrote on Instagram. "It was a huge honor to be part of your universe. The experience I had on The Fantastic Four playing Sue Storm/Invisible Woman was so meaningful as a young actress and made a huge impact on me. We will miss you, Stan Lee."
Zachary Levi
"I am so grateful to have known and worked with this man, even briefly, over the years," said Levi, who played Fandral in two Thor films. "He quite literally changed the landscape of entertainment forever. The term 'legend' seems to get thrown around a lot these days, but this man is most deserving of it. Thank you for everything, Stan. May the heavens be made more colorful with your arrival. Excelsior."
Rosario Dawson
"Overwhelmed with love and gratitude for the late, great hero, Stan Lee. Rest in paradise," the actress, who played nurse Claire Temple in multiple Netflix series, wrote on Instagram. "Thank you for your imagination, creativity, tenacity, inspiration and love!!!"
Aaron Taylor-Johnson
"The legend: Stan Lee. Very blessed to have known you," the actor, who played Quicksilver in Avengers: Age of Ultron, wrote on Instagram. "Thank you for all the heroes you assembled and gifted us."
Gregg Sulkin
"Stan the man. RIP," Sulkin, who plays Chase Stain in Hulu's Runaways, wrote on Instagram Stories. "Thank you for creating a special place for people to enjoy and work for, including me. Forever grateful."
Elizabeth Banks
"Stan Lee created one of the first characters I ever played on film and endless others that have inspired me and now my kids," Banks, who played Betty Brant in Spider-Man 3, wrote on Instagram. "Legend."
Karl Urban
"Legend. Godspeed, Stan. I feel blessed to have known you," the actor, who played Skurge in Thor: Ragnarok, wrote on Instagram. "You made this place better and brought joy to everyone you met. Rest in peace."
Jessica Henwick
"Rest in peace, Stan Lee," the actress, who played Colleen Wing in Netflix's Iron Fist, wrote on Instagram. "Such an inspiration to so many people. Changed the world as we know it."
Anthony Russo & Joe Russo
"Thank you for filling our childhoods with such joy," the directing duo wrote on Instagram. "You will be dearly, dearly missed..."
Olivia Munn
"Stan Lee gave so much to this world and to me personally. He always had a smile on his face and so much positive energy," Munn, who played Psylocke in X-Men: Apocalypse, tweeted. "I'll miss our lunches and our talks. Rest in love, Stan."
Reid Scott
"RIP, Stan Lee. He was one of my idols. One of the most prolific and influential authors of our time. His stories taught and entertained. And his characters made this nerd feel a part of a tribe of beautiful, wonderful weirdos," the actor, who played Dr. Dan Lewis in Venom, tweeted. "Thank you Stan. For everything."
Elizabeth Henstridge
"Dear Stan, thank you for your imagination and incredible ability to see the superhero within all of us, painting such wonderful stories of hope and humor," the actress, who plays Jemma Simmons on Marvel's Agents of S.H.I.E.L.D., wrote on Instagram. "You will be missed enormously but your spirit will live on in the most magical way—bringing stories and characters of inspiration, inclusion and the funniest one liners. Being able to get to work with you and hang out was a dream come true. I've never met someone with so much wit and charisma whilst also having the most humility. Plus, we filmed a scene on a moving train and you didn't miss a beat whilst I was clumsily falling over all over the place. Thank you for all your advice and the inspiration you leave all of us with. RIP. One of a kind."
James Marsters
"At a young age Stan Lee opened my eyes to the power of fantasy," the actor, who plays Victor Stein in Runaways, tweeted. "He made me want to be a hero. Fly free, Stan!"
Laura Harrier
"RIP, Stan Lee," the actress, who played Liz Allan in Spiderman: Homecoming, wrote on Instagram. "I am so honored to have been able to bring one of your characters to life!"
Seth Green
"Heartbroken. Stan Lee represents the best of us," tweeted Green, who had a cameo as Howard the Duck in a Guardians of the Galaxy post-credits scene. "How grateful I am for his existence and influence. He lived to see his creations shape the world, and his legacy will inspire generations to come. But I'll miss him. EXCELCIOR!!"