Trending badgeTrendingPosted 2 hours agoI Genuinely Cannot Look At These 27 Famous People The Same Way After Learning Their Actual NamesBillie Eilish's full name is Billie Eilish Pirate Baird O'Connell.by Lauren GarafanoBuzzFeed StaffFacebookPinterestLink 1. You know Pedro Pascal. Dominique Charriau / Getty Images His full name is José Pedro Balmaceda Pascal. He shared that he changed his name because he wanted to honor his mother, who died when he was 24. Her maiden name was Pascal. 2. You know Bruno Mars. Paras Griffin / Getty Images for BET His full name is Peter Gene Hernandez. He got the nickname Bruno from his dad, who thought he resembled pro wrestler Bruno Sammartino. He later added the last name Mars because he thought it added some pizzazz. He said, "A lot of girls say I'm out of this world, so I was like, I guess I'm from Mars." 3. You know Halsey. Savion Washington / Getty Images Her full name is Ashley Nicolette Frangipane. In an interview with Rolling Stone, they said that as a person, Ashley Frangipane was "weak and silly and sad," so they came up with a new name inspired by Brooklyn's Halsey Street subway stop. The name Halsey is also an anagram for "Ashley." 4. You know Keke Palmer. Axelle / Getty Images Her full name is Lauren Keyana Palmer. She actually prefers to be called Lauren. Keke was a family nickname, and one day her manager heard her mom use it and decided that it should be her stage name. 5. You know Elton John. Dave Benett / Getty Images His birth name is Reginald Kenneth Dwight. He wanted to have a distinct name to fit his music career. He borrowed the name Elton from his saxophonist, Elton Dean. And John was the singer, Long John Baldry, of their band, Bluesology. 6. You know Miley Cyrus. Matei Horvath / Getty Images Her birth name is Destiny Hope Cyrus. Growing up, she got nicknamed Miley because she was "smiley." The name stuck and she ended up legally changing her name in 2008. 7. You know Billie Eilish. Valerie Macon / Getty Images Her full name is Billie Eilish Pirate Baird O'Connell. Billie revealed that she was actually almost named Pirate. In her book, Billie Eilish, she wrote, "They called me 'Pirate' for months, and they were kind of planning on naming me Pirate. And soon before I was born, my grandfather died, and his name was William, aka Bill, Billie. And that's where my name came from." 8. You know Dove Cameron. Taylor Hill / Getty Images Her full name is Chloe Celeste Hosterman. She changed her name to Dove as a tribute to her father, who died when she was a teenager. In a tweet she said, "my father always called me dove. he took his own life when i was 15, i didn't get to say goodbye, so I changed it in honor of him." She later explained that her friends and family still call her Chloe. 9. You know Olivia Wilde. Taylor Hill / Getty Images Her full name is Olivia Jane Cockburn. In an interview with the New York Observer, she explained that she wanted to use a stage name because in her family, it was a tradition. She used the last name Wilde because of her love for Oscar Wilde. 10. You know John Legend. Taylor Hill / Getty Images His full name is John Roger Stephens. John got his last name from poet J. Ivy, who reportedly called John's music "old-school, like one of the legends." 11. You know Shania Twain. Tina Thorpe / Getty Images Her full name is Eilleen Regina Twain. On why she changed her name, she explained, "It's actually a long story. In short, I was born Eilleen Regina Edwards, and then I was adopted and I became Eilleen Regina Twain. Then I became a professional singer and I needed a stage name that sounded a little less like my grandmother's name, because I'm named after my grandmother, both my grandmothers, Eilleen and Regina."I think, in my mind, I was just not really wanting to be called my grandmother's name onstage, so I decided to change it to Shania Twain," she added. "I met somebody with the name Shania, thought it was beautiful, and Shania Twain was born." 12. You know Brandon Sklenar. Manoli Figetakis / Getty Images His full name is Brandon Tyler Feakins. He uses his mom's birth name because he was tired of everyone saying his last name wrong. 13. You know Jason Derulo. Gary Gershoff / Getty Images His full name is Jason Joel Desrouleaux. "Derulo" is actually the phonetic spelling of "Desrouleaux." 14. You know Skeet Ulrich. Jc Olivera / Getty Images His full name is Bryan Ray Trout. When he was a kid, he got the nickname Skeeter from his Little League coach, and he shortened it for his stage name. The name Ulrich comes from his first stepfather, whose name is D.K. Ulrich. 15. You know Dido. Dave J Hogan / Dave J Hogan / Getty Images Her full name is Florian Cloud de Bounevialle O'Malley Armstrong. She explained that at home, she was always just known as Dido, and that name stuck. 16. You know Lana Del Rey. Dave Benett / Getty Images Her full name is Elizabeth Woolridge Grant. Lana explained that in changing her name, she wanted something sh