News Caitlyn Jenner Reflects on 'Mistakes' in First Promo for New Diane Sawyer Interview By Jennifer Drysdale 4:21 PM PDT, April 7, 2017 Getty Images Life has changed a lot for Caitlyn Jenner two years after announcing her plans to transition to become a woman. In a new promo for 20/20's upcoming special, “Caitlyn Jenner: The Secrets of My Life," the former Olympian sits down with Diane Sawyer for a follow-up interview to her 2015 ABC News special. WATCH: Khloe Kardashian Confronts Caitlyn Jenner, Admits She Misses Her 'Second Dad' Bruce"Have I made mistakes? Certainly," Jenner says in the sneak peek, when Sawyer asks if she's ever had "doubts" about if she's doing the right thing. Watch the promo below:ABC Breaking News | Latest News Videos EXCLUSIVE: Caitlyn Jenner Recalls the Moment Kendall & Kylie Knew It Was ‘Going to Be OK’ After She Came Out"Caitlyn Jenner: The Secrets of My Life" with Diane Sawyer will air Friday, April 21, at 10 p.m. ET/PT on ABC. Jenner's upcoming memoir, The Secrets of My Life, will be released on April 25. See more on the biggest revelations from Jenner's 2015 20/20 interview in the video below. 12 Biggest Revelations From Bruce Jenner's 20/20 Interview This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page.