Aaron Eckhart has admitted filming new drama Rabbit Hole with Nicole Kidman wasn't easy.
The Dark Knight star told E! news that while he enjoyed working with the Oscar-winning Australian beauty, making the film about a couple grieving the death of their son took its toll on their tempers.
Aaron revealed that during filming for one scene in which they argue, things were tense between the pair off-camera.
He said: "She was irritated with me and I was irritated with her but that's the way movie-making is.
"For one day, are we not allowed? For half a day even? It's so surprising to me when people are surprised that movie making is sometimes tense and uncomfortable because inherently it's going to be.
"You're around tens of people or hundreds of people working on things that are imaginary and that come from the soul," he continued. "You could be dealing with subject matter like prostitution, death, drugs, blah, blah, blah. How could you expect that not to be uncomfortable?"
Aaron agreed to appear in the film with Nicole and director John Cameron Mitchell after a phone call to Mexico, where he was shooting The Rum Diary with Johnny Depp, and he went straight to work on the dark drama.
He said: "Rum Diary went over two weeks. We had terrible weather. So Johnny put me on his plane and flew me to New York. The next day I was in rehearsals and the next week we were shooting."