I found this interesting. http://movies.yahoo.com/blogs/movie...rs-reveal-more-just-back-story-165430475.html Outside of Chas Bono (who was famous for being someone's child, not in her own right) I can't think of anyone else famous who has changed genders. But I could be missing someone.
I remember reading years ago about him showing up to the Matrix filming occasionally dressed as a women. Seemed like he/she finally made the transition...
She actually finished the transition around a year ago and the change was widely known in Hollywood. Now is just the first official outing in public.
Walter Carlos, electronic music pioneer (Switched on Bach, A Clockwork Orange soundtrack) has been Wendy Carlos for decades. Carlos is a major influence on Kraftwerk, which is a major influence on everything.