| 108211 | September 21 | Birth | 1972 – Liam Gallagher, English singer-songwriter (Oasis, Beady Eye, and The Rain) |
| 108212 | September 21 | Birth | 1972 – Jon Kitna, American football player and coach |
| 108213 | September 21 | Birth | 1972 – David Silveria, American drummer and songwriter (Korn and L.A.P.D.) |
| 108214 | September 21 | Birth | 1972 – Scott Spiezio, American baseball player |
| 108215 | September 21 | Birth | 1973 – Derek Brewer, American model |
| 108216 | September 21 | Birth | 1973 – Heather Brewer, American author |
| 108217 | September 21 | Birth | 1973 – Keith Brewer, American model |
| 108218 | September 21 | Birth | 1973 – Vanessa Grigoriadis, American journalist and author |
| 108219 | September 21 | Birth | 1973 – Virginia Ruano Pascual, Spanish tennis player |
| 108220 | September 21 | Birth | 1973 – Oswaldo Sánchez, Mexican footballer |
| 108221 | September 21 | Birth | 1974 – Bryce Drew, American basketball player and coach |
| 108222 | September 21 | Birth | 1974 – Taral Hicks, American actress and singer |
| 108223 | September 21 | Birth | 1974 – Jana Kandarr, German tennis player |
| 108224 | September 21 | Birth | 1974 – Andy Todd, English footballer and manager |
| 108225 | September 21 | Birth | 1975 – Doug Davis, American baseball player |
| 108226 | September 21 | Birth | 1976 – Jonas Bjerre, Danish singer-songwriter and guitarist (Mew and Apparatjik) |
| 108227 | September 21 | Birth | 1976 – Poul Hübertz, Danish footballer and manager |
| 108228 | September 21 | Birth | 1977 – Kārlis Lācis, Latvian pianist and composer |
| 108229 | September 21 | Birth | 1977 – Andre Pärn, Estonian basketball player |
| 108230 | September 21 | Birth | 1977 – Brian Tallet, American baseball player |
| 108231 | September 21 | Birth | 1978 – Paulo Costanzo, Canadian actor, director, and producer |
| 108232 | September 21 | Birth | 1978 – Luke Godden, Australian footballer |
| 108233 | September 21 | Birth | 1978 – Doug Howlett, New Zealand rugby player |
| 108234 | September 21 | Birth | 1978 – Mario Miranda, Brazilian mixed martial artist |
| 108235 | September 21 | Birth | 1979 – James Allan, Scottish singer-songwriter and guitarist (Glasvegas) |
| 108236 | September 21 | Birth | 1979 – Bradford Anderson, American actor |
| 108237 | September 21 | Birth | 1979 – Richard Dunne, Irish footballer |
| 108238 | September 21 | Birth | 1979 – Chris Gayle, Jamaican cricketer |
| 108239 | September 21 | Birth | 1979 – Julian Gray, English footballer |
| 108240 | September 21 | Birth | 1979 – Monika Merl, German runner |