Celebrity Feud Alert? We hear Scarlett Johansson and Gwyneth Paltrow haven’t exactly bonded with one another during the filming of their upcoming action sequel Iron Man 2.

Set insiders tell The Sun that Gwyn and Scar are constantly at one another’s throat and the girls’ unspoken feud is creating thick tension on set for the rest of the staff.

“Gwyneth’s had to live with that and she has been very professional, but she and Scarlett haven’t developed a friendship on the shoot, which is almost at the halfway point. In fact, it’s quite the opposite.”

A source told the newspaper: “Gwyneth has become very frustrated with Scarlett. They come from different worlds and have completely different styles.”

“Gwyneth has found Scarlett very demanding of the attention of the crew. It’s not a happy set,” the snitch added. “Gwyneth and Scarlett have never been particularly close. Gwyneth was looking forward to working with Emily Blunt, who was originally in line for the part, but it ended up being Scarlett.”