Cast of Summer of '42

Jennifer O'Neill plays Dorothy, a young and beautiful war widow that Hermie develops a crush on during his summer on the island.

Gary Grimes portrays Hermie, one of the main characters, a shy and innocent teenager who falls in love with Dorothy while spending his summer on the island.

Jerry Houser takes on the role of Oscy, Hermie's best friend who provides comedic relief and moral support throughout their summer adventures.

Oliver Conant plays Benjie, another friend of Hermie and Oscy, who joins them in their adolescent escapades on the island.

Katherine Allentuck portrays Aggie, a local island girl who befriends Hermie and his friends during their memorable summer.

Christopher Norris appears as Miriam, another local resident who interacts with Hermie and his friends, adding depth to the island community.

Lou Frizzell plays the Druggist, a character who interacts with the boys during their summer adventures, providing a dose of reality amidst their youthful escapades.

In an uncredited role, Walter Scott plays Dorothy's Husband, whose memory haunts Dorothy and influences her interactions with Hermie.

Although uncredited and only heard as Hermie's Mother's voice, Maureen Stapleton adds emotional depth to the narrative through her poignant portrayal.

Also uncredited as the Narrator, Robert Mulligan's voice guides the audience through the nostalgic and emotional journey of Summer of '42.