Freddie Prinze Jr. and Kiefer Sutherland
It's rare to get an actor to actively tell interviewers why they have certain issues with their co-stars, but Freddie Prince Jr. did not hold back. He didn't last long on the popular drama 24 and wasn't shy about sharing why he left. "I did 24 and it was terrible. I hated every moment of it. Kiefer was the most unprofessional dude in the world. That's not me talking trash. I'd say it to his face. I think everyone that's worked with him has said that."