A petition has been launched over an adoption joke in the new Avengers movie that organisers have slammed as "insulting".
The petition, which has 247 signatures, is over a line muttered by Chris Hemsworth's character Thor, after Scarlett Johansson's Black Widow tells him his brother Loki - a villain - has killed "80 people in two days".
Thor replies: "He's adopted."
Petition organiser Jamie Berke said scriptwriter Joss Whedon should have thought about how the line would impact on viewers who were adopted themselves.
"According to your scriptwriter, the fact (Loki) was adopted is the reason he is a bad guy," Berke said.