Bruce Jenner is expected to make the official announcement to the world that he is undergoing a transition from man to woman in the upcoming interview with Diane Sawyer on ABC’s 20/20.

The former Olympian’s transition has been widely speculated and documented via occasional quotes and photographs.

ABC News has described the two-hour interview as “far-ranging”.

Bruce Jenner’s transition seemed to be confirmed last month by his daughter Kendall in an Us Weekly interview, but the magazine since retracted the story.

The publication originally quoted Kendall Jenner as saying: “He’s a wonderful man. And just because he’s changing shoes now, so to speak, doesn’t make him less wonderful. I will always love my dad, whether he’s a man or a woman.”

However, Kendall Jenner fired back on Twitter: “Shame on US Weekly for making up quotes. I NEVER said those things. I never spoke to them.”

Bruce Jenner – The Interview special will air on Friday, April 24th, at 9/8c on 20/20.