Who would've thought that Billy Crystal and Martin Scorsese shared history before becoming mainstream successes? The actor recounted the time when he was at New York University and the acclaimed director was a grad student and his professor.

Billy Crystal recalled what it was like having Martin Scorsese as a film professor in the late 1960s at NYU while appearing on the 'Sunday Sitdown with Willie Geist' podcast.

Billy Crystal is thinking back on his formative years in Martin Scorsese's classroom. On the Dec. 15 episode of the "Sunday Sitdown with Willie Geist” podcast, Crystal talked about his time being taught by Scorsese at New York University.