VIDEO : Robert Downey Jr. Behind The Scenes Video From Endgame Shows Katherine Langford

Robert Downey Jr. shared a behind-the-scenes video from the moment he wrapped filming "Avengers: Endgame."

In the video, you can see "13 Reasons Why" star Katherine Langford clapping as the actor goes around and hugs crew members on the set.

Langford was supposed to appear as the adult version of Tony and Pepper Potts' daughter, Morgan, in a dream sequence.

According to Business Insider, her part was cut because test audiences were confused.