Rubuta ci gaba don wannan sakin layi - Preston yana ɗaya daga cikin mutane da yawa da ake kira "Beatle na Biyar". A wani lokaci a lokacin zaman "Get Back", John Lennon ya ba da shawarar cewa ya shiga ƙungiyar (wanda Paul McCartney ya yi jayayya cewa yana da wuyar isa ga yarjejeniya tare da hudu). Preston ya taka leda da kuma lantarki piano ga Beatles a lokacin da dama daga cikin "Get Back" zaman; wasu daga cikin wadannan zaman ya bayyana a cikin fim din "Let It Be" da kuma a kan ta abokin album. Preston kuma ya bi band din a kan piano na lantarki don wasan kwaikwayon rufin
, bayyanar jama'a ta ƙarshe ta ƙungiyar. A watan Afrilu na 1969, an ba da lambar yabo ta "Get Back" zuwa "The Beatles tare da Billy Preston", lokaci ne kawai da aka ba da irin wannan haɗin gwiwa a kan sakin hukuma na Beatles (wanda ya bambanta da sake sake buga wasu rikodin Hamburg-era wanda suka kasance ƙungiyar goyon baya ga Tony Sheridan). An ba da bashi ta Beatles don nuna girman kasancewar Preston a kan waƙa; Piano na lantarki ya yi fice a ko'ina kuma yana wasa mai tsawo. Preston kuma ya yi aiki, a cikin mafi ƙarancin matsayi, a kan kundin "Abbey Road", yana ba da gudummawa ga sashin "I Want You (She's So Heavy) " da "Something".