- La Desideria – Ana González Olea
- La Goulue – Louise Weber
- La Sylphe – Edythe Lambelle
- Patti LaBelle – Patricia Louise Holte
- Cheryl Ladd – Cheryl Jean Stoppelmoor
- Diane Ladd – Rose Diane Ladner
- Lady Gaga – Stefani Joanne Angelina Germanotta
- Lady Sovereign – Louise Amanda Harman
- Lagbaja – Bisade Ologunde
- Suki Lahav – Tzruya Lahav (also known as Tsruya Lahav)
- Bert Lahr – Irving Lahrheim
- Leon Lai – Lai Chit
- Chasey Lain – Tiffany Anne Jones
- Dame Cleo Laine – Clementina Dinah Campbell
- Frankie Laine – Francesco Paolo LoVecchio
- Papa Jack Laine – George Vital Laine
- Arthur Lake – Arthur Silverlake
- Florence Lake – Florence Silverlake
- Veronica Lake – Constance Frances Marie Ockleman (later known as Connie Keane, her stepfather's surname)
- Barbara La Marr – Reatha Dale Watson
- Hedy Lamarr – Hedwig Eva Maria Kiesler
- Dorothy Lamour – Mary Leta Dorothy Slaton
- David Lander – David Landau
- Audrey Landers – Audrey Hamburg
- Judy Landers – Judith Hamburg
- Carole Landis – Frances Lillian Mary Ridste
- Michael Landon – Eugene Michael Orowitz (or Eugene Maurice Orowitz, varying sources)
- Abbe Lane – Abigail Francine Lassman
- Allan Lane (a.k.a. Rocky Lane) – Harry Leonard Albershardt
- Charles Lane – Charles Gerstle Levison
- Jocelyn Lane – Jocelyn Bolton
- Leota Lane – Leotabel Mullican
- Lola Lane – Dorothy Mullican
- Lupino Lane – Henry William George Lupino
- Nathan Lane – Joseph Lane
- Priscilla Lane – Priscilla Mullican
- Rosemary Lane – Rosemary Mullican
- Sunny Lane – Holly Hodges
- Belinda Lang (a.k.a. Belinda Hawk) – Belinda Lange
- Eddie Lang – Salvatore Massaro
- Fritz Lang – Friedrich Christian Anton Lang
- Jonny Lang – Jon Gordon Langseth, Jr.
- June Lang – Winifred June Vlasek
- Sue Ane Langdon – Sue Lookhoff
- Susan Lanier (a.k.a. Susan Lanier-Bramlett) – Susan Jean Engledow
- Joi Lansing – Joyce Rae Brown
- Robert Lansing – Robert Howell Brown
- Sherry Lansing – Sherry Lee Heimann
- Snooky Lanson – Roy Landman
- Mario Lanza – Alfredo Arnold Cocozza
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- Laura La Plante – Laura LaPlant
- Violet La Plante (a.k.a. Violet Avon) – Violet LaPlant
- Alexandra Maria Lara – Alexandra Plătăreanu
- Laraaji – Edward Larry Gordon
- Tito Lara – Agustín Enrique Lara Olivencia
- Alexis Laree – Michaela Laree James
- Eddie Large – Edward Hugh McGinnis
- Rod LaRocque – Rodrique (or Rodrigue) la Rocque de la Rour
- Amel Larrieux – Amel Eliza Stowell
- Keith Larsen – Keith Eric Burt
- Brie Larson – Brianne Sidonie Desaulniers
- Wolf Larson - Wolfgang von Wyszecki
- Larry the Cable Guy – Daniel Lawrence Whitney
- Danny LaRue – Daniel Patrick Carroll
- Jack La Rue – Gaspere Biondolillo
- Barbara Lass – Barbara Kwiatkowska
- James Last – Hans Last
- Andrew Laszlo – László András
- Queen Latifah – Dana Elaine Owens
- Stan Laurel – Arthur Stanley Jefferson
- Dyanna Lauren – Diane Hurley
- Piper Laurie – Rosetta Jacobs
- Lea Laven (a.k.a. Lea Forssell) – Lea Luukinen
- Daliah Lavi – Daliah Lewinbuk
- Peter Lawford – Peter Sydney Ernest Aylen
- Blackie Lawless – Steven Duren
- Jody Lawrance – Nona Josephine Goddard
- Carol Lawrence – Carol Maria Laraia
- Florence Lawrence – Florence Annie Bridgwood
- Gertrude Lawrence – Gertrude Alice Dagmar Klasen
- Joey Lawrence – Joseph Lawrence Mignona, Jr.
- Steve Lawrence – Sidney Liebowitz
- Vicki Lawrence – Vicki Ann Axelrad
- Yank Lawson – John Rhea Lawson
- Dorothy Layton – Dorothy Ann Wannenwetsch
- Layzie Bone – Steven Howse
- Barbara Lea – Barbara LeCoq
- Lead Belly/Leadbelly – Huddie William Ledbetter
- Francis Lederer – František Lederer
- Kuh Ledesma – Maria Socorro Ledesma
- Inda Ledesma – Margarita Rodríguez
- Amos Lee – Ryan Anthony Massaro
- Anna Lee – Joan Boniface Winnifrith
- Arthur Lee – Arthur Taylor Porter
- Brenda Lee – Brenda Mae Tarpley
- Bruce Lee – Lee Jun-fan
- Dee C. Lee – Diane Sealey
- Dixie Lee – Wilma Winifred Wyatt
- Frances Lee – Merna Tibbetts (or Myrna Tibbetts)
- Geddy Lee – Gary Lee Weinrib
- Georgia Lee – Dulcie Rama Pitt
- Gwen Lee – Gwendolyn Lepinski
- Gypsy Rose Lee – Rose Louise Hovick
- Hyapatia Lee – Victoria Lynch (or Vicki Lynch)
- Lila Lee – Augusta Wilhelmena Fredericka Appel
- Madeline Lee – Madeline Lederman
- Michele Lee – Michele Lee Dusick
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- Peggy Lee – Norma Delores Egstrom
- Pinky Lee – Pincus Leff
- Ruta Lee – Ruta Mary Kilmonis
- Spike Lee – Shelton Jackson Lee
- Stan Lee – Stanley Martin Lieber
- Tommy Lee – Thomas Lee Bass
- Andrea Leeds – Antoinette Lees
- Lila Leeds – Lila Lee Wilkinson
- Left Eye – Lisa Nicole Lopes
- John Legend – John Stephens
- Silvia Legrand (a.k.a. "Goldie") – María Aurelia Paula Martínez Suárez
- Val Lehman – Valerie Kathleen Willis
- Lucky Lehrer - Keith Michael Lehrer
- Lehri (Pakistani actor) – Safirullah Siddiqui
- Dorian Leigh – Dorian Leigh Parker
- Janet Leigh – Jeanette Helen Morrison
- Jennifer Jason Leigh – Jennifer Lee Morrow
- Megan Leigh – Michelle Maira Schei
- Mitch Leigh – Irwin Michnick
- Vivien Leigh – Vivian Mary Hartley
- Jan Leighton – Milton Lichtman
- Lillian Leitzel – Leopoldina Alitza Pelikan
- John Le Mesurier – John Charles Elton Le Mesurier de Somerys Halliley
- Lemmy – Ian Fraser Kilmister
- Marcelle Lender – Anne-Marie Marcelle Bastien
- Dan Leno – George Wild Galvin
- Rosetta LeNoire – Rosetta Olive Burton
- Rula Lenska – Rosa Marie Lubienski
- Lotte Lenya – Karoline Wilhelmine Charlotte Blamauer
- Queenie Leonard – Pearl Walker
- Robert Sean Leonard – Robert Lawrence Leonard
- Sheldon Leonard – Sheldon Leonard Bershad
- Téa Leoni – Elizabeth Téa Pantaleoni
- Amy Leslie – Lillian West
- Joan Leslie – Joan Agnes Theresa Sadie Brodel
- John Leslie (pornographic actor) (akas: John Leslie Dupre, Frederick Watson, and Lenny Lovely) – John Leslie Nuzzo
- Mark Lester – Mark Letzer
- Jay Lethal – Jamar Shipman
- LeToya – LeToya Luckett
- Gigi Leung – Leung Bik-zi (later changed to Leung Wing-kei)
- Johnny Lever – John Rao
- Samantha Lewes – Susan Jane Dillingham
- Al Lewis – Alexander Meister
- Bobo Lewis – Barbara Lewis
- Ed "Strangler" Lewis – Robert Herman Julius Friedrich
- Gary Lewis (actor) – Gary Stevenson
- Gary Lewis (musician) – Gary Harold Lee Levitch
- Huey Lewis – Hugh Anthony Cregg, III
- Jerry Lewis – Jerome Levitch (not Joseph, as Lewis had once claimed)
- Meade Lux Lewis – Meade Anderson Lewis
- Robert Q. Lewis – Robert Goldberg
- Shari Lewis – Sonia Phyllis Hurwitz
- Smiley Lewis – Overton Amos Lemons
- Ted Lewis – Theodore Leopold Friedman
- Val Lewton – Vladimir Ivan Leventon (also known briefly as Carlos Keith)
- Pío Leyva – Wilfredo Leiva Pascual
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