Christopher Ashton Kutcher ( \ / ˈkʊtʃər \ / ) ( born February 7 , 1978 ) is an American actor , producer , and former model .
Christopher Ashton Kutcher ( \ / ˈkʊtʃər \ / ; born February 7 , 1978 ) , known professionally as Ashton Kutcher , is an American actor , producer , and former model .