Anne Hathaway "threw a fit" when she discovered Amanda Seyfriend's Oscars gown was similar to her own.
The 30-year-old actress originally planned to wear a Valentino dress to the Academy Awards but after Amanda, 27, showed her Les Miserables co-star a picture of her own dress, Anne reportedly flipped out.
A source told Us Weekly: "Anne was like 'WTF?!' She started throwing a fit! She never told Amanda she had to change the dress. Amanda didn't want to deal with it and left.
"I kind of can't understand why Anne didn't wear the Valentino gown, anyway. She was the one winning the award, not Amanda. Who cares?"
Best Actress winner Anne eventually chose a Prada gown but not before she made her team wait hours while she decided.