He Knows You're Alone (1980)

Title: He Knows You're Alone

Tagline: "Every girl is frightened the night before her wedding. But this time...There's good reason."R

Release Date: Sept. 1980 He Knows You're Alone (1980) is known as one of the earliest slasher films directly produced and inspired by the success from Halloween  (1978). It was filmed in Staten Island, NY. It features stalk and slash elements as the villain preys upon soon-to-be newly weds.

Plot
"A young bride is murdered on her wedding day by the man she rejected for her current fiancé Len, a police detective. Several years later the killer starts a crime spree, murdering brides to be. Len believes the killer of his fiancè has returned and tracks the crimes. The killer stalks bride to be Amy, and her friends from college, Nancy and Joyce. Amy is having second thoughts about her planned marriage. Her ex-boyfriend Marvin returns and tries to rekindle their relationship." from wiki

Cast

 * Don Scardino as Marvin
 * Caitlin O'Heaney as Amy Jensen
 * Elizabeth Kemp as Nancy
 * Tom Rolfing as Ray Carlton
 * Lewis Arlt as Det. Len Gamble
 * Patsy Pease as Joyce
 * James Rebhorn as Prof. Carl Mason
 * Dana Barron as Diane Jensen
 * Tom Hanks as Elliot
 * Paul Gleason as Det. Frank Daley