The 94-year-old comic book publishing legend put his hands and feet in a block of concrete, which will be displayed in front of the theater.
Producer Kevin Feige and actors Kevin Smith, Clark Gregg, Chadwick Boseman and Jason Mewes all spoke fondly of Lee, gushing about his legacy and how he touched their lives.
Mewes also paid homage to Lee's wife of 69 years, Joan Lee, who died earlier this month, saying she "had just as much impact on Stan as Stan had on the rest of us."
"I've been the luckiest man in the world because I've had friends and to have the right friends is everything. People you can depend on, people who tell you the truth if you ask something. I've been lucky," Lee said. "I've been lucky to have a wonderful wife. And I'm lucky to be standing here in front of you now, wishing desperately that I had written a speech."
The past few days have been exciting for Stan Lee, who was recently named a Disney legend at the D23 Expo, alongside Mark Hamill, Oprah Winfrey and Whoopi Goldberg. Lee — a co-creator of characters such as Spider-Man, the Fantastic Four, Hulk, Thor and the X-Men — told the crowd at the imprint ceremony that he was "overwhelmed" by the day's festivities.
"I can't tell you what this means to me. I'm thrilled," he said. "And if I'm half as good as everybody said I am, I'm far too good to be wasting time with ordinary people. But I seem to be spending my life with ordinary people, who are the best people in the world."