Authors born in 1978
- Andrew Schneider Screenwriter, 1978
- Andris Nelsons Conductor, 1978
- Andy Irons Surfer, 1978
- Andy Samberg Actor, 1978
- Anna Meredith Composer, 1978
- Anna Mouglalis Actress, 1978
- Anna Ternheim Singer, 1978
- Anne Sewitsky Screenwriter, 1978
- Anthony Evans Singer-Songwriter, 1978
- Anthony Famiglietti Athlete, 1978
- Anthony Jeselnik Comedian, 1978
- Anthony Mackie Actor, 1978
- Antonio Esfandiari Poker Player, 1978
- Ari Shapiro Journalist, 1978
- Ariel Pink Multi-Instrumentalist, 1978
- Arina Tanemura Artist, 1978
- Aron Flam Comedian, 1978
- Aryn Kyle Novelist, 1978
- Ashley Williams Actress, 1978
- Ashton Holmes Actor, 1978
- Ashton Kutcher Actor, 1978
- Ayumi Hamasaki Record Producer, 1978
- B.J. Penn Martial Artist, 1978
- Baran Odar Film Director, 1978
- Barclay Littlewood Entrepreneur, 1978
- Barry Ferguson Coach, 1978
- Barry Zito Baseball Player, 1978
- Bassnectar Disc Jockey, 1978
- Bebe Singer-Songwriter, 1978
- Becki Newton Television Actor, 1978
- Ben Clymer Hockey Forward, 1978
- Ben Cohen Rugby Union Player, 1978
- Ben Lee Actor, 1978
- Ben Lovett Composer, 1978
- Ben McKenzie Actor, 1978
- Ben Roberts-Smith Businessman, 1978
- Benjamin Burnley Musician, 1978
- Benjamin McKenzie Actor, 1978
- Beth Riesgraf Actress, 1978
- Bill Hader Actor, 1978