For more than three decades, Cher was made to believe that her legal first name was Cherilyn. It wasn't until the late '70s, when she obtained her birth certificate in order to change her full name to just Cher, that she discovered that she had been registered as "Cheryl."

Cher in a black and white outfit with long wavy hair, standing in front of a blue background with "Balmain" written on it. Cher was shocked to find out the name on her birth certificate when she applied to legally change her name in the 1970s.

In the late '70s, after Cher already gained great acclaim for her music and projects like The Sonny and Cher Comedy Hour, she decided to legally change her name to just "Cher," on

Cher has revealed what her actual legal birth name after an incident with her birth certificate. The pop icon discussed finding out her legal name in her new new memoir, Cher: The Memoir, Part One. The memoir was recently released on Nov.

Cher, who is worldwide famous for her four-letter name, was under the impression that she was born Cherilyn Sarkisian until her 30s, when she discovered a mistake on her birth certificate. Her legal name was actually Cheryl.

Cher has revealed the painful discovery that her legal birth name was not what she thought it was, due to a mix-up on her birth certificate. The pop icon recently released her memoir, Cher: the Memoir,