Brie Larson (34 years old)
Oct 1 American actress (Room; Captain Marvel), singer and director, born in Sacramento, California
- Oct 2 Roman Ibramkhalilov, Ukrainian heavy metal guitarist (Jinjer -"Pisces"), born in Ukraine
Dakota Johnson (34 years old)
Oct 4 American actress (Fifty Shades film series), and daughter of Melanie Griffith & Don Johnson, born in Austin, Texas
- Oct 4 Kimmie Meissner, American figure skater (World Championship gold, 2006 (singles)), born in Bel Air, Maryland
- Oct 4 Lil Mama [Niatia Jessica Kirkland], American rapper (VYP: Voice of the Young People), born in New York City
- Oct 4 Tei Shi [Valerie Teicher Barbosa], Colombian-Canadian singer-songwriter, born in Buenos Aires, Argentina
- Oct 5 Travis Kelce, American football tight end (Super Bowl LIV, LVII; 4 × First-team All-Pro; 8 × Pro Bowl; Kansas City Chiefs), born in Westlake, Ohio
- Oct 11 Henry Lau, Hong Kong-Canadian singer (Super Junior-M), born in Toronto, Ontario
Michelle Wie (34 years old)
Oct 11 American golfer (US Open 2014), born in Honolulu, Hawaii
Alexandria Ocasio-Cortez (34 years old)
Oct 13 American politician (Rep-D-New York 2018-), born in New York City
- Oct 15 Anthony Joshua, English professional boxer, 2012 Olympic Gold Super-heavyweight, born in Watford, England
- Oct 17 Phoebe Tonkin, Australian actress
- Oct 22 JPEGMafia [Barrington Hendricks], American hip-hop singer, rapper, and record producer ("Does This Ski Mask Make Me Look Fat?"), born in Brooklyn, NYC
- Oct 24 Eliza Taylor-Cotter, Australian actress (Neighbours), born in Melbourne, Australia
- Oct 24 Shenae Grimes (also Grimes-Beech), Canadian-American (90210 - "Annie"), born in Toronto, Ontario
Mia Wasikowska (34 years old)
Oct 25 Australian actress (Alice in Wonderland), born in Canberra, Australia
- Oct 25 Seth Mumy, American actor (3 Wishes), born in Los Angeles, California
- Oct 29 Primož Roglič, Slovenian road cyclist (winner Vuelta a España), born in Trbovlje, Yugoslavia
- Oct 30 Claudia Jessie, English actress, know for "Bridgerton", born in Birmingham, England
- Oct 30 Nastia Liukin, Russian born American gymnast (2008 Olympic Champion), born in Moscow, Soviet Union
- Oct 30 Vanessa White, British pop singer (The Saturdays - "Living For The Weekend"), born in Yeovil, England
About October 1989
How Old? 34 years old
Generation: Millennial
Leap Year: No