It's not something I would necessarily have chosen, although even I have heard of Cary Grant and Sophia Loren, and it was billed as a light family comedy.
The story is about a widower (Cary Grant) with three rather riotous children, who is having a string of bad luck. It's also about a rich young lady (Sophia Loren) who runs away from home and takes a job as nanny to the children, without revealing her identity.
Most of the film takes place while the family are on holiday in a houseboat... which is not quite as expected, so various predictable disasters ensue. And, of course, there's a romantic element...
We thought it was a reasonable film; not bad, exactly, but a bit dull. I don't know why it was considered so brilliant, but then there weren't so many films made in 1958. It's in colour, but feels very dated, and despite the stars a lot of it seemed rather over-acted.
Still, it makes a pleasant enough story in the end - certainly innocuous family viewing, hence the U rating for the UK.
Review copyright Sue's DVD Reviews