Bruce Jenner: First clip of highly anticipated Diane Sawyer interview aired after months of 'transgender' rumours

The former athlete spoke about his extended family, saying: 'I can't let myself hurt them'

Bruce Jenner has been the subject of rumours that he's in the process of changing his gender for almost a year, and now the first clip of his tell-all interview has been released.

Jenner - once a legendary decathlete and now a reality TV star - has attracted a huge amount of publicity after speculation over whether his appearance has changed over the last 12 months, but now he is setting the record straight himself.

In the interview with Diane Sawyer, Jenner speaks emotionally about his family, saying: "I can't let myself hurt them. They're the only ones I'm concerned with."

Jenner has 10 children - six biological and four step-children - which includes Kourtney, Khloe, Kim and Rob Kardashian, Kendall and Kylie Jenner, and Brody, Burt, Casey and Brandon Jenner. While his children are not thought to speak during the interview, they are supportive of their father.

Addressing the rumours in January, Kim Kardashian said: “He’s our dad so we support him no matter what, and I think when the time is right, he’ll talk about whatever he wants to talk about. I just think it’s his story to talk about, not really mine.”

Jenner has not previously spoken about the rumours. This didn't stop magazine InTouch running a front cover with a picture of Jenner PhotoShopped so he looked like he was wearing make-up with the cover-line "My Life As A Woman". The full interview is scheduled to air on Friday 24 April.