"What, besides eating too much sushi, caused Jeremy Piven to quit Speed-the-Plow?" Cohen asked the actress. (Piven, 47, famously left the Broadway production early, claiming he had mercury poisoning.)
"That's a very good one. I could go on and on," Moss, 30, said, with a big smile on her face. "Being highly unprofessional," she gave as her answer.
"We were all surprised," Moss added of Piven's exit. "It came out of nowhere. He just didn't come back one day."
But she did run into him not long after he left. "I saw him like a month later at the Golden Globes," she shared. "When he was supposed to be really sick."
"Well, I mean, we've all seen the pictures so, I mean, I would suppose so," Moss said with a smirk. "That's all I know."
This article originally appeared on Usmagazine.com: Elisabeth Moss Slams Jeremy Piven as "Highly Unprofessional"