Margot Robbie has said that she refused to move the release date for Barbie to make way for Oppenheimer at the cinema.In a new interview, Robbie was speaking to star of Oppenheimer Cillian Murphy about the success both films had over the summer.Barbie became the highest-grossing movie of the year worldwide, and the highest-grossing film ever by a female director while Oppenheimer broke multiple cinema records this summer including becoming the fourth highest-grossing IMAX release of all time internationally and the highest grossing film biopic of all time.Robbie asked Murphy if he thought “so many people were gonna watch a movie about the making of the atomic bomb” to which he laughed and replied: “Um…no! [Director] Christopher Nolan was always determined that it would be released in the summer as a big temple movie. That was always his plan.