Cher recently revealed she was ‘shocked’ to learn what her real name was when she went to change her name legally.

In her new memoir, Cher: The Memoir, Part One, the music icon, 78, recalled finding out there was a birth certificate mix-up in the hospital when she was born.

She said that she believed her name was Cherilyn for many years before she went to legally change it to her moniker Cher.

The Goddess of Pop — who said that her late ex-husband Sonny Bono would ‘like’ how she portrayed him in her new memoir — explained in her tell-all: ‘I believed Cherilyn was my name until the day years later when I decided to legally change my name to simply Cher.’

She said she was surprised when she discovered her name was Cheryl.

Cher explained that the mix-up happened at the hospital when her mother, just age 19 at the time, went into labor a month earlier than her due date.

Cher recently revealed she was ‘shocked’ to learn what her real name was when she went to change her name legally; pictured October 15 in New York City

In 1946, she said her mother Georgia Holt also went through a long, unmedicated labor.

‘She was exhausted by the time I arrived at around 7:30 a.m. on Monday, May 20,’ Cher wrote in her memoir.

She said that when her mother was recovering after giving birth, a nurse asked for her name.

It was then the misunderstanding occurred.

‘My mother had no idea, but the woman insisted so she replied, “Well, Lana Turner’s my favorite actress and her little girl’s called Cheryl. My mother’s name is Lynda, so how about Cherilyn?’

The Grammy winner went to legally change her full name to Cher in the late ’70s and dropped her four surnames — her birth name Sarkisian, plus the last names of her stepfather Gilbert LaPiere and ex-husbands Sonny Bono and Gregg Allman.

In order to change her name legally and officially, she needed to present her birth certificate and when she got it, that’s when she learned her name wasn’t what she thought it had been for her entire life at that point.

The Grammy winner went to legally change her full name to Cher in the late ’70s and dropped her four surnames — her birth name Sarkisian, plus the last names of her stepfather Gilbert LaPiere and ex-husbands Sonny Bono and Gregg Allman; pictured 1983 in Los Angeles

Cher explained that the mix-up happened at the hospital when her mother, just age 19 at the time, went into labor a month earlier than her due date. In 1946, she said her mother Georgia Holt also went through a long, unmedicated labor; pictured November 2010 in Hollywood

In her new memoir, Cher: The Memoir, Part One, the music icon, 78, recalled finding out there was a birth certificate mix-up in the hospital when she was born. She said that she believed her name was Cherilyn for many years before she went to legally change it to her moniker Cher; pictured July 2018 in London

After learning that her name was wrong on the birth certificate, Cher said she asked her mom about it.

The singer recalled her mother telling her: ‘I was only a teenager, and I was in a lot of pain. Give me a break.’

Previously, the Believe singer shared the reason she wanted to change her legal name to Cher back in 1979.

‘I like it,’ Cher told Johnny Carson on The Tonight Show at the time.

The Goddess of Pop explained in her tell-all: ‘I believed Cherilyn was my name until the day years later when I decided to legally change my name to simply Cher.’ She said she was surprised when she discovered her name was Cheryl; pictured October 24 in Santa Monica

After learning that her name was wrong on the birth certificate, Cher said she asked her mom about it. The singer recalled her mother telling her: ‘I was only a teenager, and I was in a lot of pain. Give me a break’; pictured January 1986 in portrait

‘It’s better for me than having people wonder if they should call me Mrs. Allman or Mrs. Bono or Mrs. Bono Allman or Miss Cher or whatever.’

She added: I mean, Cher is just fine. Just plain Cher.’

Elsewhere in her memoir, Cher also made other revelations including the only celebrity to break up with her.

She also opened up about why she decided to divorce her ex, Gregg Allman, after just nine days of marriage.