Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Michael J. Fox shine farkon zabi don wasa Marty McFly, amma ya kasance mai sadaukarwa ga wasan kwaikwayon Family Ties. Mai shirya Family Ties Gary David Goldberg ya ji cewa Fox yana da mahimmanci ga nasarar wasan kwaikwayon. Tare da co-star Meredith Baxter a kan izinin haihuwa, ya ki yarda Fox lokaci kashe su yi aiki a kan wani fim. Komawa zuwa nan gaba an shirya shi ne don sakin Mayu 1985 kuma ya kasance a ƙarshen 1984 lokacin da aka koya cewa Fox ba zai iya yin fim a cikin fim ɗin ba. Zaɓuɓɓuka biyu na Zemeckis na gaba sune C. Thomas Howell da Eric Stoltz. Stoltz ya burge masu samarwa sosai tare da hoton da ya gabata na Roy L. Dennis a cikin Mask (wanda har yanzu ba a sake shi ba) cewa sun zaɓe shi ya yi wasa da Marty McFly. Saboda mawuyacin hali, an tura ranar farawa sau biyu. Makonni huɗu a cikin yin fim, Zemeckis ya ƙaddara Stoltz ya zama ba daidai ba. Kodayake shi da Spielberg sun fahimci sake yin fim ɗin zai ƙara dala miliyan 3 zuwa kasafin dala miliyan 14, sun yanke shawarar sake sakewa. Spielberg ya bayyana cewa Zemeckis ya ji Stoltz ba shi da ban dariya kuma ya ba da "wasan kwaikwayo mai ban mamaki". Gale ya kara bayyana cewa suna jin Stoltz kawai yana taka rawa ne, yayin da Fox da kansa yana da halin kamar Marty McFly. Ya ji cewa Stoltz ba shi da jin dadi a kan skateboard, yayin da Fox bai kasance ba. Stoltz ya furta wa darektan Peter Bogdanovich a lokacin kiran waya, makonni biyu a cikin harbi, cewa bai tabbata da shugabancin Zemeckis da Gale ba, kuma ya yarda cewa bai dace da rawar ba. An buɗe jadawalin Fox a watan Janairun 1985 lokacin da Baxter ya koma Family Ties bayan da ta yi ciki. Ma'aikatan Back to the Future sun sake ganawa da Goldberg, wanda ya yi yarjejeniya cewa babban fifiko na Fox zai kasance Dangantakar Iyali, kuma idan rikici ya tashi, "mun yi nasara". Fox ya ƙaunaci rubutun kuma ya burge shi ta hanyar Zemeckis da Gale na jin dadi wajen sakin Stoltz, saboda duk da haka "sun yi magana sosai game da shi". Per Welinder da Bob Schmelzer sun taimaka a wuraren wasan skateboarding. Fox ya sami zanen Marty McFly ya zama na sirri sosai. "Duk abin da na yi a makarantar sakandare shi ne...  Tambaya: Wane irin hali ne Fox yake da shi?
Marty McFly