Cher was taken aback upon learning about the error on her birth certificate that led to her legal name being incorrect.

When she was in her 30s, Cher remembered how she reacted upon first learning of her legal name.

In her new memoir "Cher: The Memoir, Part One," the 77-year-old singer revealed that she was "shocked" to see her first name listed as "Cheryl" on her birth certificate when she applied to legally change her name to her famous mononym in 1979.

According to People magazine, in her book, the "Moonstruck" actress recalled that she believed her name was Cherilyn until the day she decided to legally change it to simply Cher years later.

In 1946, Cher's mother, Georgia Holt, was 19 years old when she gave birth to the singer. According to Cher's book, Holt went into labor a month earlier than her expected due date. Cher revealed that her mother endured a lengthy labor without medication at a small hospital in El Centro, California.

By the time I arrived at 7:30 a.m. on Monday, May 20, the music icon was already exhausted.

A nurse visited Holt after she gave birth to Cher to inquire about the name she had chosen for her baby.

Cher wrote, "My mother was unaware, but the woman insisted, so she replied, 'Well, Lana Turner is my favorite actress and her little girl's called Cheryl. My name is Lynda, so how about Cherilyn?'"

Holt failed to notice that the nurse mistakenly recorded the newborn's name as Cheryl due to exhaustion and recovery from labor.

After discovering something, Cher confronted her mother and asked Holt, "Mom, do you even know my real name?"

"I believed Cherilyn was my name until the day years later when I decided to legally change my name to simply Cher." — Cher

The "Believe" songstress claimed that Georgia took her daughter's birth certificate and then shrugged after examining it.

Cher remembered her mother telling her, "You were just a teenager and going through a lot of pain. Give yourself a break."

Cher, the only child of Holt and John Sarkisian, was born when her parents divorced when she was just 10 months old. Despite remarrying in 1965, the couple divorced the following year. Holt, who was married to five other husbands, kept her ex-husband's surname until her death at the age of 96 in 2022.

Cher adopted the surnames of her ex-husbands Sonny Bono and Gregg Allman after her third husband Gilbert LaPiere legally adopted her.

The Oscar winner opted to discard her four surnames, namely Sarkisian, LaPiere, Bono, and Allman, when she officially changed her name to "Cher."