Hear From Bruce Jenner for the First Time in a Promo from Diane Sawyer's Exclusive Interview

— -- Bruce Jenner speaks for the first time in a new promotional clip of Diane Sawyer’s exclusive interview with the former Olympic champion.

“My whole life has been getting me ready for this,” Jenner said in a promo that will begin airing on the ABC Television Network tonight.

Jenner sat down with Sawyer for a far-ranging, two-hour interview that will air on Friday, April 24 during a special edition of “20/20.”

The special, “Bruce Jenner – The Interview,” airs on ABC at 9 p.m. ET.