The Walt Disney Co -owned network said "Bruce Jenner The Interview," a two-hour programme with Diane Sawyer, would be far-ranging and exclusive but gave no further details.
According to media reports, the 65-year-old former track and field star has told his family that he is transgender.
Jenner, who won a gold medal in the decathlon at the 1976 Olympics in Montreal, made headlines in February when People magazine reported that he had told his ex-wife, Kris Jenner, and his sons and daughters that he was becoming a woman.
The magazine said the family pledged their support and wanted him to be happy.
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Media reports at the time said Jenner would come out as transgender during an interview with Sawyer and that he would star in a reality TV show about his transition.
No one was immediately available at ABC to comment.
(Reporting by Patricia Reaney; Editing by Richard Chang)
