"It was going to propel me to something I knew I didn't have the resources to cope with. I knew I had to do a lot of foundation building.
"I was just really clear about it," Danes said. "I wasn't conflicted, I wasn't.
"I was just feeling eager to have different creative experiences, that felt like a repeat. And, as I said, I think it was gonna propel me towards something that I knew I didn't have the resources to cope with. And I knew I had to do a lot of foundation building."
The 'Homeland' actress remembered how Leonardo also had doubts about the movie but ultimately signed on to play Jack Dawson.
She recalled: "I remember, Leo and I shared a manager at the time, and we were there at the office. And I was on a balcony, which is funny...and Leo had this rental red convertible...and he was kinda going in circles in the parking lot.
"And I knew he was wrestling with the decision to do that movie or not and he just looked up at me, and he said, 'I'm doing it. I'm doing it.'
"And I could see he wasn't sure, but he was like, 'F**k it, I gotta do this thing.'
"And I looked down on him going, I totally understand why you are doing it. And I'm not ready for that. And I think I really wasn't ready for it."
-Bang! Showbiz