According to the Los Angeles times, the special has since been edited to replace the photo as well as correcting names for twin brothers James and Oliver Phelps.
During the special, which is available to watch in New Zealand on TVNZ OnDemand, Watson revealed she had a secret crush on a co-star when she was filming the franchise.
Watson confirmed she fancied Tom Felton who played Draco Malfoy in the films.
Emma Watson reunited with her castmates for a Harry Potter reunion special. Photo / Getty Images
"I walked into the room where we were having tutoring and the assignment we had been given was to draw what you thought God looked like. And Tom had drawn a girl with a backward cap, on a skateboard. And I just don't know how to say it: I just fell in love with him," Watson said.
"I used to come in every day and look for his number on the call sheet. Number 7. And if his number was on the call sheet, it was an extra exciting day.
"I think the truth of it was, Tom was often the one I could always be more vulnerable with."
Felton said he "became very protective over her" on set.
"I've always had a soft spot for her and that continues to the day. There's always been something that's, I don't know, a kinship."
But the actors confirmed their connection never crossed into romance territory.
Watson said: "Nothing has ever ever ever happened romantically with us, we just love each other. That's all I can say about that."
