Authors born in 1978
- A. J. Buckley Actor, 1978
- A. J. Cook Actress, 1978
- Aaron Bruno Singer-Songwriter, 1978
- Aaron Klein Radio Personality, 1978
- Aaron Richard Bruno Singer, 1978
- Aarti Mann Actor, 1978
- Aarti Sequeira Chef, 1978
- Adam Christopher Novelist, 1978
- Adam Gontier Musician, 1978
- Adam Kinzinger Politician, 1978
- Adam Rickitt Actor, 1978
- Adam Thirlwell Writer, 1978
- Adepero Oduye Actress, 1978
- Adrian Younge Composer, 1978
- Ahmed Akkari Imam, 1978
- Aimee Garcia Actress, 1978
- AJ McLean Singer, 1978
- Alejandra Deheza Singer, 1978
- Alesha Dixon Singer, 1978
- Alex Ebert Musician, 1978
- Alex Lemon Poet, 1978
- Alex Timbers Theatre Director, 1978
- Alexandra Lara Actress, 1978
- Alexandra Maria Lara Actress, 1978
- Alexandre Aja Film Director, 1978
- Alice Dellal Model, 1978
- Alice Smith Singer, 1978
- Alina Bronsky Writer, 1978
- Alison Lundergan Grimes Attorney At Law, 1978
- Alison Mosshart Singer, 1978
- Alix Smith Photographer, 1978
- Alys Fowler Horticulturist, 1978
- Amal Clooney Barrister, 1978
- Amanda Schull Actress, 1978
- Amy Chow Gymnast, 1978
- Anastasia Griffith Actress, 1978
- Andrea Gabriel Actress, 1978
- Andrea Tantaros Politician, 1978
- Andrew Neel Film Maker, 1978
- Andrew Rannells Actor, 1978