New York - ABC says that Diane Sawyer will conduct a two-hour interview with Bruce Jenner that will air on Friday, 24 April.
ABC says the former Olympic champion will give a "far-ranging interview."
Jenner has not spoken publicly about it but he has been looking more feminine in appearance, and those in his inner circles have not challenged speculation that he is preparing to live as a woman.
The Keeping Up With The Kardashians TV star was spotted out for a hike on Monday morning as his tell all interview date was confirmed.
MailOnline reported Jenner's hike came shortly after rumours that he had a boob job emerged however, the Olympian refused to comment.
There has been talk about a reality show that discusses Jenner's transition, but the E! Entertainment network that carries Kardashian programming has not commented about it.
The Sawyer interview has been rumored for several weeks, but ABC didn't talk about it until Monday and was confirmed to air at 21:00 on ABC news.