"Kiefer was the most unprofessional dude in the world," says Freddie Prinze Jr. when interviewed by ABC Radio News reporter Jason Nathanson.

He claims that he wanted to quit showbiz because Kiefer Sutherland was difficult to work with. He dropped the bomb when he was promoting his new Disney Series, "Star Wars Rebel".

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Prinze Jr. worked with Sutherland back in 2010. They worked together for the TV Series "24".

When asked about his experience with Sutherland, he pointed out that it was terrible and that he hated every moment of it.

He adds that Sutherland was unprofessional and it's not in any way trashtalking. He would say it to Sutherland's face if given the chance.

He also noted that he thinks everyone who has worked with Sutherland thinks that he is indeed unprofessional.

Aside from dissing about Sutherland's attitude, he also talked about his height. He says that when in a scene with Sutherland, he had to take his shoes off and Sutherland had to stand on an apple box. 

But why did Prinze Jr. bring this up now? According to some sources, he never badmouthed Sutherland before during promo tours of their show.

He was interviewed by Fox Press and he said that Sutherland is someone who appreciates a person who has the willingness to learn. He adds that he enjoys working with Sutherland and that it is very rewarding.

Sutherland's rep did release a statement and it was not a refute against Prinze Jr.

Sutherland's rep says that this is the first time he has heard of Prinze Jr.'s grievances.

His rep said that Sutherland enjoyed working with Prinze Jr. five years ago. His rep added that Sutherland wishes Prinze Jr. the best in his career.

Prinze Jr. did however stop acting for quite a while after his run in the series '24'. He has gotten back on track and will be appearing in the animated series "Star Wars Rebels".

TagsFreddie Prinze Jr., Kiefer Sutherland, 24, unprofessional, Comic Con