Eric Harris and Dylan Klebold

Eric David Harris and Dylan Bennet Klebold were American high school seniors who perpetrated the Columbine High School massacre at Columbine High School on April 20, 1999 in Columbine, Colorado. Harris and Klebold killed 12 students, one teacher, and wounded 24 others. After killing most of their victims in the school's library, they died by self-inflicted gunshot wounds. At the time, it was the deadliest high school shooting in U.S. history.

9 April 1981

Born on the same birth date (9 April 1981): A. J. Ellis • Dennis Sarfate • Ireneusz Jeleń • Milan Bartovič

Born on the same birth day (9 April): Albert Hammond Jr. • Austin Peck • Camilla Battista da Varano • David Robertson (baseball) • Giovanni Andrea Cornia • Graham Gano • Iain Duncan Smith • Ihor Podolchak • Ireneusz Jeleń • J. William Fulbright • Jay Baruchel • Jeff Zucker • Konrad Tom • Nigel Slater • Paul Willis (actor) • Paulina Porizkova • Simon Brown, Baron Brown of Eaton-under-Heywood • Sol Hurok • Søren Christian Sommerfelt • Wallace McCain • Óscar Razo

Born in the same month (April 1981): Alexei Semenov (ice hockey) • April 6 • Daba Modibo Keïta • Dennis Sarfate • Frédérick Bousquet • Hitoe Arakaki • Ireneusz Jeleń • John McFall (athlete) • Kapil Sharma • Liz McClarnon • Mariqueen Maandig • Matthew Emmons • Matthieu Proulx • Maya Dunietz • Michael A. Monsoor • Michael Clarke (cricketer) • Milan Bartovič • Mompati Thuma • Taylor Dent • Troy Polamalu • Veronica Pyke • Yuko Nakanishi