Authors born in 1973
- Kai Hahto Musician, 1973
- Kailash Kher Singer, 1973
- Kamila Shamsie Writer, 1973
- Karen Abbott Author, 1973
- Karin Lowachee Author, 1973
- Kate Beckinsale Actress, 1973
- Kate Jacobs Author, 1973
- Kate Thornton Journalist, 1973
- Kathleen Robertson Actress, 1973
- Kathryn Hahn Actress, 1973
- Keiko Agena Actress, 1973
- Keith Fullerton Whitman Musician, 1973
- Kelly Price Singer, 1973
- Keri Smith Author, 1973
- Kevin Feige Film Producer, 1973
- Kevin McKidd Actor, 1973
- Khalilah-Azraa Vieira Rapper, 1973
- Kojo Annan Businessman, 1973
- Kris Holden-Ried Actor, 1973
- Kristen Wiig Actress, 1973
- Kristin Armstrong Bicycle Racer, 1973
- Kyp Malone Musician, 1973
- Larry Page Entrepreneur, 1973
- Laurent Brancowitz Musician, 1973
- Leander Paes Tennis Player, 1973
- Lee Westwood Golfer, 1973
- Len Wiseman Director, 1973
- Lena Headey Actress, 1973
- Lexa Doig Actress, 1973
- Li Bingbing Actress, 1973
- Lisa Ling Journalist, 1973
- Liu Bolin Artist, 1973
- Logan Green Businessman, 1973
- Louis Leterrier Film Director, 1973
- Lucy Davis Actress, 1973
- Lucy Peng Businesswoman, 1973
- Luther Dickinson Guitarist, 1973
- Lynsey Addario Photographer, 1973
- M. Ward Singer-Songwriter, 1973
- Mackenzie Astin Actor, 1973