Among the biggest stars of the MCU is Robert Downey Jr., who starred in the well-received "Iron Man" years ago. That was part of the launching of the MCU and Avengers films, which have become huge blockbusters. Downey posted to Instagram to let everyone know that Stan Lee gave him the role of a lifetime based on his superhero creation.
From Robert Downey Jr.— Marvel Universe (@77MCU) November 12, 2018
To Stan Lee..
“I owe it all all to you”