Did You Catch This? on Instagram: "Why Eric Stoltz Was Recast as Marty McFly Before Michael J. Fox made Back to the Future iconic, Marty McFly was played by Eric Stoltz. After five weeks of filming, director Robert Zemeckis and producer Steven Spielberg realized Stoltz’s take was too serious for the film’s comedic tone. Though a talented actor, his intensity didn’t match the lighthearted spirit they envisioned. Fox was then brought in, reshooting nearly every scene—and the rest became cinematic