Chaz was born Chastity in 1969 to Cher and Sonny Bono
Cher's son Chaz Bono has asked a judge in Los Angeles to formally change his name and gender following the sex change surgery he had last year.
The 41-year-old, who was born Chastity Sun Bono, now wants to be known as Chaz Salvatore, according to a petition filed earlier this week.
He revealed last June he had undergone the surgery calling it "the best decision I've ever made".
At the time, Cher promised to support her child on his "difficult journey".
"Although I may not understand, I will strive to be understanding," said the singer, who had Chastity with her first husband, the late Sonny Bono, in 1969.
A hearing has been scheduled for 6 May in Santa Monica, California.
Chaz Bono is a gay rights campaigner who appeared on the American version of Celebrity Fit Club in 2006.
The name Chastity came from the title of the 1969 film Cher made with her first husband Sonny, who died in a skiing accident in 1998.