Invasion Of The Saucer Men (1957)

Starring Steve Terrell, Gloria Castillo, Frank Gorshin, Raymond Hatton, Lyn Osborn
Directed by Edward L. Cahn
(actor & director credits courtesy IMDB.com)

After an alien spaceship lands near a small town, a pair of eloping teenagers hit one of the little green men with their car, and the others make trouble for the couple.

A unique sci-fi comedy from American International Pictures that hits upon the same themes of teenagers not being trusted by adults revisited a year later in The Blob, this is a fun picture, highlighted by Paul Blaisdell's iconic designs for the alien creatures.  With round craniums, bulging eyes, and needles protruding from their fingers when they attack, the aliens are both fearsome and comical, well-echoed by Ronald Stein's mirthful musical theme for them.  Actor Frank Gorshin would go on to greater fame playing the Riddler on the 1960s Batman TV series.