- Sep 3 Garrett Hedlund, American actor, born in Roseau, Minnesota
- Sep 4 Camila Bordonaba, Argentine actress and singer-songwriter, born in El Palomar, Argentina
- Sep 13 Nabil Abou-Harb, Arab-American filmmaker, born in Marietta, Georgia
- Sep 14 Adam Lamberg, American actor (The Lizzie McGuire movie), born in New York City
- Sep 14 Ayushmann Khurrana, Indian actor and singer (Vicky Donor), born in Chandigarh, India
- Sep 14 Melissa McGhee, American rock singer (American Idol, season 5), born in Tampa, Florida
- Sep 16 Sabrina Bryan, American actress and singer (The Cheetah Girls), born in Yorba Linda, California
- Sep 17 Eugenia Volodina, Russian supermodel
- Sep 19 Kevin Zegers, Canadian actor and model, born in Woodstock, Ontario
- Sep 22 Laura Vandervoort, Canadian actress (Haven, Smallville), born in Toronto, Ontario
- Sep 22 Misha Green, American screen writer, director and producer (Lovecraft Country), born in Sacramento, California
- Sep 22 Theresa Fu, Hong Kong Cantopop singer and actress, born in British Hong Kong
- Sep 23 Anneliese van der Pol, Dutch-American actress (That's So Raven & Raven's Home -"Chelsea"), born in Naaldwijk, Netherlands
- Sep 26 Thore Schölermann, German actor, born in Iserlohn, Germany
- Sep 29 Adriene Mishler, American yoga teacher (Yoga with Adriene on YouTube), born in Austin, Texas
About September 1984
How Old? 39 years old
Generation: Millennial
Leap Year: Yes
Actors
Actresses
Comedians
Directors
Models
TV Stars