2022 · 1 Died before season 4 2 Introduced in season 4 3 Died before the events of season 1 Eren Jeager – 15 Born on March 30th, Eren Jeager is 15 years old during most of seasons 1 – 3, set in 850. 9 juil. 2021 · Home Anime 09 Jul 2021 7:16 AM -07:00 UTC How Old is Eren? Eren Jaeger's Age in Attack on Titan Eren was 12 years old when he enlisted in the Cadet Corps, graduating at the age of 15 By.