Unfortunately, fans may never know, as the exes arrived one hour apart at The Cinema Society's screening of the film in New York City Thursday. Though Skarsgard, 35, stayed less than half an hour, he had only good things to say about his ex, 28. See more photos from the Straw Dogs premiere.
"She was great," he told Us Weekly. "She's a total pro."
Twenty minutes after Skarsgard left, Bosworth (clad in a Antonio Beradi dress) arrived and greeted costar James Marsden, 37. The fashion-forward star told Us that she "absolutely adored" working with her ex, despite his character raping her in the film.
"The last three weeks of the film were incredibly demanding both emotionally and physically and we all really hunkered down," she explained. "To stay in your emotional headspace for something like this, it's almost like training for a marathon. It's really quite an intense experience. "