Transcript for Bruce Jenner Talks with Diane Sawyer: Sneak Peek
Finally tonight, rarely does an interview provoke as much public curiosity as Diane sawyer's sit down with Bruce Jenner that airs tomorrow on ABC. Here now ABC's Amy robach has a sneak preview. Reporter: The interview the world is waiting to hear. Bruce Jenner talks about his thoughts and his worries. It's going to be an emotional roller coaster but somehow I will get through it. Reporter: His journey and future. I want to know how the story ends. You know? How does my story end? Reporter: It's a question so many have been asking with speculation and rumors about Jenner hitting a fevered pitch over the last few months. It made me who I am. Reporter: Jenner has been in the public eye since 1976 when he became an instant celebrity, winning the olympic decathlon and known as the world's greatest athlete. And then in 2007 reinventing himself as a reality star on "Keeping up with the kardashians." Step father of four and father of six he plans to open up to Diane sawyer it is that family he worries about now. Those are the only ones I'm concerned. I can't let myself hurt them. Do not miss that interview on "20/20" tomorrow night at 9:00 eastern here on ABC. We will have more tomorrow night on "Nightline."
This transcript has been automatically generated and may not be 100% accurate.