Bruce Jenner To Family -- I Knew I was a Woman Since Age 5

Bruce Jenner recently opened up to his family that he has known since the age of 5 that he was a female.

Family sources tell TMZ, Bruce told the klan he has kept his "true self" inside since he was a child, and even during the '76 Olympics -- when he was considered the greatest male athlete in the world -- in his head he was a woman.

That said, we're told Bruce has "never been female" in front of any of his kids. As for what that means, we're told in part he never wore female attire around the children.

Bruce has not told the Kardashians what his new name will be, and we've learned he will NOT reveal it during his interview with Diane Sawyer.