TMZ.com first reported that the child of entertainers Sonny and Cher, began the process earlier this year.
"Yes, it's true -- Chaz, after many years of consideration, has made the courageous decision to honor his true identity," confirmed Bono's publicist, Howard Bragman.
Bono, 40, came out as a lesbian nearly 20 years ago.
Bono is a civil rights advocate, journalist, author and musician.
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