His family reports that Armstrong died due to complications from a heart-bypass surgery which he received earlier this month.
Armstrong served as the commander for the Apollo 11 mission and is famous for his quote, "That's one small step for man, one giant leap for mankind" during his historical landing on the surface of the moon last July 20, 1969.
Neil Alden Armstrong, his full name, was 38 years old when he went aboard that space mission. And despite the celebrity status he got when he came back to Earth, Armstrong remained humble and led a simple life in the Cincinnati area with his wife, Carol.
"We are heartbroken to share the news that Neil Armstrong has passed away," the family said in their statement. "Neil was our loving husband, father, grandfather, brother and friend."
Armstrong leaves behind two sons, a stepson and stepdaughter, 10 grandchildren, a brother and a sister. Rest in peace sir, and thank you for being part of mankind's history.