Superman Tells Jimmy Olsen He’s Clark Kent
Not sure why Superman decided all of a sudden to start telling his friends and the world that he is Clark Kent, gonna have to read up on Volume 5 of the Superman comic series.
Superman brings Jimmy Olsen to Gotham to tell him his secret identity. Jimmy pulls a gag on Superman and later tells him that Lois Lane already called him earlier that morning to reveal Superman’s identity.
From – Superman Vol. 5 #18