Netflix actor Joseph Quinn broke down in tears at a comic event when a fan thanked him for his behaviour at an earlier signing.
The Stranger Things star, 29, couldn't contain his emotions during his first ever Comic Con appearance at Olympia London.
Quinn recently rose to fame after playing the character Eddie Munson in the hit TV series.
In the video, he can be seen getting emotional on stage after one fan expressed her thanks to him for giving time to the fans at the busy convention.
She also refers to an incident that happened the day before, when Comic Con staff reportedly allegedly rushed a meet and greet.
In the video, the fan said: "Hi, mine's not really a question, it's more an extension of gratitude really.
"I'm sure a lot of us have heard what happened yesterday, whether it's true or not, about how you were treated.
"I won't really comment on it, I just wanted to say, thank you from all of us - we're really grateful your sharing the time.
She added: "Thank you for signing our things, spending time with us and making our summer.
"I think we've all connected with Eddie for one reason or another."
Quinn replied "ah why did you do that" - before wiping a tear from his eye.
He added: "That's very kind of you. Thank you for your kind words."
An eyewitness said: "The day before, staff weren't letting him interact with fans, sign autographs or do anything - they were treating him like a child.
"So when the girl next to me stood up and thanked him he got overwhelmed.
"In that moment I think he saw the amount of love people had for him and his character."