Eric Roberts is baring it all in his new memoir, "Runaway Train: Or, The Story of My Life So Far." The book details the highs and lows of the actor's life, including his stint with drugs and how it impacted his relationship with his sister Julia Roberts and daughter Emma Roberts. When asked why he included a "public apology" to his sister in his book, Eric Roberts said he said he owes his family "a lot.

" "I always grapple when I'm asked about my relationship with my sister, or my daughter, or my family of origin because for many years, I was a practicing drug addict, so a lot of people were alienated, especially the family," he said on TODAY during a Sept. 18 appearance on the show. "And I owe them a lot because I love them.

I owe them a lot because they love me." Though his memoir touches on his life and experiences, Eric Roberts said there's one major experience he didn't get to include in his book: his time on " ." The "Expendables" actor is competing with veteran ballroom dancer Britt Stewart on Season 33 of the hit reality TV show.

"The sad thing about this is, this week I'm also on 'Dancing with the Stars,' and had I known I was going to be on it, I would have held off the publication so that could be the last chapter," he said. As for his experience on the program, Eric Roberts said he was quite terrified. "You know, I've got a lot of courage.

I have never been more frightened in my life. It was mind-blowing and spooky," he shared. Read on to learn more about Eric Robe.