- Oct 2 Beau Grayson, American son of country singer Tanya Tucker
- Oct 10 Gabriella Cilmi, Australian singer and songwriter (Lessons To Be Learned), born in Melbourne, Victoria, Australia
- Oct 10 Lali Espósito, Argentine actress, singer and model, born in Buenos Aires, Argentina
- Oct 10 Mariana Pajón, Colombian BMX rider (Olympic gold 2012, 16), born in Medellin, Colombia
- Oct 11 Chauncey Matthews, American Juniors singer, born in San Diego, California
- Oct 15 Owen Joseph Kline, son of Phoebe Cates & Kevin Kline
- Oct 18 Tyler Posey, American actor
- Oct 23 Princess Mako of Akishino of Japan
- Oct 31 Jordan-Claire Green, American actress (School of Rock), born in Terceira Island, Portugal
About October 1991
How Old? 28 years old
Generation: Millennial
Leap Year: No
Chinese Zodiac: Goat/Sheep
Star Signs: Libra (Sep 23 - Oct 22), Scorpio (Oct 23 - Nov 21)