On an Island with You

On an Island with You

Year: 1948

Runtime: 107 mins

Language: English

Director: Richard Thorpe

ComedyMusicRomance

A lively MGM musical brims with song, dance and romance. A young Navy lieutenant is hired as technical adviser for a flashy song‑dance‑and‑swim picture produced by screen star Rosalind Reynolds. Having performed with her at a Forces show, he mistakenly assumes she’ll become his sweetheart, a notion her current boyfriend promptly disputes.

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On an Island with You (1948) – Full Plot Summary & Ending Explained

Read the complete plot breakdown of On an Island with You (1948), including all key story events, major twists, and the ending explained in detail. Discover what really happened, and what it all means.

On a sun-soaked Hawaiian tropical island, Rosalind Reynolds, Esther Williams, a swimming sensation, headlines a film with her fiancé, Ricardo Montez Ricardo Montalban. The project includes U.S. Navy Lt. Lawrence Y. Kingslee Peter Lawford, the film’s military technical adviser, who soon finds himself drawn to Rosalind. Yvonne Torro, Cyd Charisse, Rosalind’s best friend and fellow star, secretly wants Ricardo for herself. The behind-the-scenes world of filmmaking blends with the island’s lush scenery, setting the stage for romance and danger.

Three years earlier, Larry met Rosalind during a USO show at his Pacific base, and that memory resurfaces as their paths cross again on set. After sharing a kiss, Larry makes no secret of wanting to spirit Rosalind away on his aircraft. At the Royal Aloha hotel, the film crew is treated to a lively performance by real-life orchestra leader Xavier Cugat and his orchestra, adding a splash of musical glamour to the proceedings.

On the day of a key scene where Rosalind flies over the set, Larry seizes the chance to fly to the island where they first met, hoping for another kiss that would seal his claim. He returns to their aircraft with his feelings confirmed, only to discover that the natives have stolen parts and stranded them on the island.

Meanwhile, her fiancé and the search party he formed are captured by the cannibals who inhabit the tropical isle, but are saved by his rival. The entanglements grow denser as loyalties are tested against a backdrop of peril and splendor.

With events spiraling, Rosalind takes the blame for the unauthorized flight to the island in a bid to shield Kingslee from a court-martial. The truth about Yvonne’s romance emerges: she has become involved with Ricardo, creating a new layer of tension. In the end, Larry and Rosalind realize they are in love, while Yvonne’s involvement with Ricardo reshapes the circle of affections and settles into a bittersweet, hopeful note.

Last updated: February 24, 2026 at 09:50

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On an Island with You (1948) Plot Questions Answered – Summary FAQ

Explore frequently asked questions about On an Island with You (1948) with spoiler-rich answers covering the full plot summary, major story beats, character motivations, hidden details, and ending meaning. This movie summary FAQ helps explain confusing scenes, plot twists, and narrative decisions in clear, searchable detail.

Q1

Why does Rosalind take the blame for the unauthorized flight?

A.

Rosalind takes the blame to protect Larry from a court-martial. Since she is the film's star and has more standing with the production, her claiming responsibility shields the Navy lieutenant from military consequences while also buying time for their relationship to develop.

Earlier, Larry reveals he wants to spirit Rosalind away on his aircraft, establishing his reckless willingness to break rules for her.

court-martialblameflightrosalindlarryprotection
Q2

How did Larry and Rosalind meet three years earlier?

A.

Larry met Rosalind during a USO show at his Pacific base three years before the film production begins. The memory of that meeting stays with him, and when he becomes the technical adviser on her movie, he sees it as a chance to rekindle their connection.

The film establishes early that Larry's attraction predates the movie's events, giving his pursuit deeper roots.

uso showpacific basemeetinglarryrosalindthree years
Q3

Why does Yvonne want to be with Ricardo when he's already engaged?

A.

Yvonne Torro, Rosalind's best friend and co-star, secretly harbors romantic feelings for Ricardo. Despite knowing he's engaged to Rosalind, her desire for him persists throughout the production, eventually leading to an actual affair that is revealed later in the film.

Yvonne's secret motives and the rivalries among the cast surface early as underlying tension.

yvonnericardolove triangleengagementaffair
Q4

What happens when Ricardo's search party is captured?

A.

When Ricardo organizes a search party to find Rosalind and Larry on the island, the group is captured by the island's cannibals. However, they are saved by Ricardo's rival, adding an unexpected twist to the rescue operation and reshaping the dynamics between the characters.

The cannibals are introduced as a threat when the natives steal airplane parts, foreshadowing their later involvement.

cannibalssearch partyricardocapturedrescuedrival
Q5

Why do the natives steal the airplane parts?

A.

The natives on the island steal essential parts from Rosalind and Larry's aircraft after they land. This strandings them on the island and becomes a pivotal plot device that forces the characters to confront their feelings while trapped together, advancing the romantic storyline.

The theft occurs immediately after Larry and Rosalind's romantic encounter on the island.

nativesstolen partsairplanestrandedisland
Q6

Why does Larry want to take Rosalind away on his aircraft?

A.

Larry wants to spirit Rosalind away on his aircraft because he has been in love with her since meeting her at the USO show three years earlier. He sees the film production as an opportunity to pursue her, and his plan to fly her away represents his willingness to challenge her engagement to Ricardo.

This desire is established early when Larry kisses Rosalind and reveals his plan to abduct her.

larryrosalindaircraftabductloveengagement
Q7

How does the rivalry between Larry and Ricardo develop?

A.

The rivalry between Larry and Ricardo develops naturally from the love triangle. Larry, as the Navy technical adviser, works closely with Rosalind and openly pursues her despite her engagement to Ricardo. Ricardo, as Rosalind's fiancé, views Larry as a threat, and tensions escalate when Larry's feelings become public knowledge.

Larry makes no secret of his intentions, directly challenging Ricardo's claim.

rivalrylarryricardolove trianglejealousy
Q8

What causes Rosalind to admit her feelings for Larry?

A.

Rosalind admits her feelings for Larry after being stranded with him on the island, where the proximity and shared peril force her to confront her attraction. The combination of the romantic setting and the danger they face together helps her acknowledge that her feelings for Larry have grown stronger than her engagement to Ricardo.

The island scene where Rosalind admits she is attracted to him builds toward this final acknowledgment.

rosalindlarryloveadmissionfeelingsisland
Q9

When is Yvonne's romance with Ricardo revealed?

A.

Yvonne's romance with Ricardo is revealed after the main group leaves the island. The revelation comes as a shock to everyone and adds a new layer of complexity to the love triangle, as Yvonne has been secretly involved with Rosalind's fiancé throughout the production.

Yvonne's secret motives are hinted at early in the film, leading to this later revelation.

yvonnericardoromancerevealedsecret affair
Q10

Why is the film production setting important to the plot?

A.

The film production setting on the Hawaiian island serves as more than just a backdrop. It brings Larry into contact with Rosalind, provides the context for their reunion, and creates situations (like the flight to the island) that drive the romantic conflict forward. The glamorous world of filmmaking contrasts with the island's adventure, enriching the narrative.

Larry is hired specifically as a technical adviser, placing him directly in Rosalind's orbit.

film productionhawaiian islandsettingbackdropfilmmaking
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