Splash!: Elvis horses around with his younger cousin Billy Smith in the spring of 1956. They had to fill the pool with a garden hose attached to the kitchen sink and after six hours it was still only half fullPhotograph: Alfred WertheimerElvis takes a break between the rehearsal and the live taping of Stage Show at CBS’s TV Studio 50 in Manhattan. He’s reading some of that day’s fan lettersPhotograph: Alfred WertheimerA backstage colour portrait just before going on to record the Steve Allen ShowPhotograph: Alfred WertheimerElvis and fellow soldiers of Company D 1st Battalion 32nd Armor and 3rd Armored Division walk the gangplank of the USS Randall. They had to repeat the manoeuvre for the assembled photographersPhotograph: Alfred WertheimerElvis at the piano in a mid-Manhattan loft studio. Elvis and his cousin Junior Smith are waiting for the Steve Allen Show script rehearsal to start on 29 June 1956Photograph: Alfred WertheimerFinal touch: the famous quiff is already a featurePhotograph: Alfred WertheimerElvis relaxes on the back patio with his family before the concert at Russwood Park. His cousin Bobby and father are in the backgroundPhotograph: Alfred WertheimerRare portrait studies in colour of Elvis performing the 8pm show live at the Mosque Theater, as they appear in Elvis and the Birth of Rock and RollPhotograph: Alfred Wertheimer'Don't be Cruel': RCA Victor Studio 1, 2 July 1956Photograph: Alfred WertheimerThe King's speech: Elvis on tthe Armed Forces Radio Service in 1958 Photograph: Alfred WertheimerPhotograph: Action images