Trivia

First major Hollywood studio picture directed by Ron Howard.

Breakthrough and first starring role of Michael Keaton.

Early screen roles for Kevin Costner and Shannen Doherty. Costner as a frat boy in the morgue party scene (a non-speaking bit part), and Doherty plays a "Blue Bell" (liken to a "Girl Scout") in an elevator scene (with one line). This is her first physical appearance in a feature film. She had previously done voice work in the animated feature The Secret of NIMH (1982).

Henry Winkler took the role of the wimpy morgue director to play a character opposite of the macho Fonzie character. "I thought I'd play Richie Cunningham for once," he said on Twitter.

The annoying saxophone player on the subway is director Ron Howard.

Ron Howard: Howard and his wife Cheryl Howard appear as the couple making out in front of Chuck's (Henry Winkler's) apartment building.