Robert Downey Jr. has revealed a new video from the set of Avengers: Endgame, and it stars the whole cast assembled together singing “Happy Birthday” to the first Iron Man movie, which turns 11 years old today.
This video was clearly shot last year while the cast and crew were shooting the final major fight scene between the Marvel heroes and Thanos and his army. In this video, the cast of the film is all geared up in their costumes.