Die Vermählung ihrer Eltern geben bekannt

The screenplay originally called for only a few trick photography shots of Hayley Mills in scenes with herself. The bulk of the movie was to be shot using a body double. After producer Walt Disney saw how seamless the processed shots were, he ordered the script reconfigured to include more of the visual effect with her playing both twins in the same scenes.

While singing "Let's Get Together," twice Sharon's hand momentarily disappears crossing over into Susan's frame.

An early US laserdisc release is missing the car scene mentioned above, but not the pool transition a few minutes later. It is, on the other hand, also missing about 50 seconds at the start of the conversation between Margaret and her father as she tries to pack for the trip to CA (during which he informs her of the plane ticket, questions her choice of dress, and ponders what sort of lady Mitch might have married since the breakup). Like many Disney releases, it is also missing the distribution title card (Buena Vista) and the accompanying drummed introduction to the title song.

Edited into Disney-Land: The Title Makers/Nature's Half Acre (1961)