In the trailer for the new Chaz Bono documentary Becoming Chaz, Cher says: “At some point, I'm going to have to start calling her him.”

Becoming Chaz, which focuses on Bono's gender reassignment, premiered in January at the Sundance Film Festival, where it was acquired by Oprah Winfrey's nascent cabler OWN.

The 42-year-old Bono, who was born Chastity Bono to gay idol Cher and the late entertainer-politician Sonny Bono, announced last June that he was eight months into gender reassignment.

“I hated my body since puberty,” Bono says in the trailer for the film released by OWN. “But sex change never occurred to me at that point. I went on hormones and started to feel comfortable.”

“There's a lot of stuff that she [Cher] really doesn't know, because I haven't told her. And there was that fear: Who's going to love someone like me?”

The sex reassignment is “making me feel more confident,” Bono adds.

“You know, at some point, I'm going to have to start calling her him,” Cher says. (The video is embedded it he right panel of this page.)