Gwyneth and Scarlett Fueding?

Out with the old, in with the new? Set-side rumors from the Iron Man 2 set are buzzing that the films female leads, Gwyneth Paltrow and Scarlett Johansson, are hatin' on eachother.

“Gwyneth has become very frustrated with Scarlett,” a source told British newspaper The Sun. “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.”

“Gwyneth and Scarlett have never been particularly close,” the insider added. “Gwyneth was looking forward to working with Emily Blunt, who was originally in line for the part, but it ended up being Scarlett.

“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 half way point.

“In fact, it’s quite the opposite.”