Authors born in 1978
- Kobe Bryant Athlete, 1978
- Kristen Schaal Actress, 1978
- Kristofer Hivju Actor, 1978
- Kumail Nanjiani Actor, 1978
- Kuno Becker Actor, 1978
- Kurt Busch Driver, 1978
- Laetitia Casta Actress, 1978
- LaToya London Singer, 1978
- Laura Story Singer-Songwriter, 1978
- Lauren Ambrose Actress, 1978
- Lauren German Actress, 1978
- Lauren Groff Novelist, 1978
- Laurence Fox Actor, 1978
- Liberty Ross Actress, 1978
- Lina Maria Hedlund Singer, 1978
- Lindsay Gael Christina Elaine Armaou Actress, 1978
- Lindsay Hartley Actress, 1978
- Lisa Jakub Writer, 1978
- Liu Yang Astronaut, 1978
- Liya Kebede Supermodel, 1978
- Lorene Scafaria Screenwriter, 1978
- Lorrie Fair Football Player, 1978
- Louise Brown Celebrity, 1978
- Louise Woodward Celebrity, 1978
- Luis Fonsi Singer, 1978
- Luis von Ahn Entrepreneur, 1978
- Luke Kirby Actor, 1978
- Luke Scott Baseball Player, 1978
- Maajid Nawaz Politician, 1978
- Maddox Writer, 1978
- Maelle Gavet Entrepreneur, 1978
- Malin Akerman Actress, 1978
- Manju Warrier Actress, 1978
- Manny Pacquiao Politician, 1978
- Marc Forgione Chef, 1978
- Maria Menounos Actress, 1978
- Marisa Miller Model, 1978
- Marko Jaric Basketball Player, 1978
- Martin Lel Marathon Runner, 1978
- Martin Lopez Drummer, 1978