Jon Cryer Sets Record Straight on Wild Charlie Sheen Headlines, Talks Tough Times on 'Two and a Half Men' Set

Jon Cryer joined “Extra's” Mario Lopez at Universal Studios Hollywood and opened about the difficulty of writing his new book, "So That Happened: A Memoir,” saying, it “took great pains for it be accurate.”

Making it accurate meant sharing his experiences with his former “Two and a Half Men” co-star, Charlie Sheen. Jon revealed the Sheen gave him his blessing to write the book. “He knew I was writing it, I told him, he was excited about the fact I was writing it, actually he and I had a lot of good years together before it wasn't so good.”

The times that weren't so good played out during filming of their hit CBS show. “We had to deal with the year and a half where he was on trial in Colorado, all that, that made things tough because we still had to work with the guy, he was under a lot of pressure, but he still got it done on the set even though there were days when he wasn't there and you could tell things were unraveling for him.”

In the book, Cryer talked about his former “Two and a Half Men” co-star's fall from grace. “It was very hard to watch a friend go through that, and it was so tied into my job as well. In the end, the fear… we were worried he was going to die, it seemed like his life was spiraling.”