The 42-year-old actor was on the show to chat about his new film Rabbit Hole.
Aaron recently revealed that there were days he and co-star Nicole Kidman didn’t always get along at work, especially while filming an intense scene where their characters argue.
“She was irritated with me and I was irritated with her but that’s the way movie-making is,” he told E! Online.
“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,” he added.
Also pictured on Conan‘s Monday episode: 24‘s Mary Lynn Rajskub.