"When You Were Young" is a song by American rock band The Killers. It was released on September 18, 2006 as the lead single from their second studio album Sam's Town (2006). The song was written and produced by The Killers and co-produced by Flood and Alan Moulder.The song has proven to be one of The Killers' most successful singles, peaking at number 14 on the Billboard Hot 100, as well as their only number one to date on the U.S. Modern Rock Tracks chart. Only "Mr.