I first came across this image in the second copy of Janus magazine that I purchased (although the image reproduced below comes from elsewhere). They were running a series about spanking scenes in mainstream movies and this one featured June Allyson in the film 'Too Young To Kiss'.
The plot of the movie (from IMDb) is "Eric Wainwright (Van Johnson), a busy impresario, is besieged by hordes of wannabe concert stars, eager for their big break. One of them is Cynthia Potter (June Allyson), a talented pianist... but she can't get in to see him. When she learns that Wainwright is auditioning young musicians for a children's concert tour, Cynthia dons braces and bobby sox and passes herself off as a child prodigy."
On the occasion that led to the spanking she had thrown his cigarettes in the swimming pool.
I loved the image then and I still do now - I've always had a thing for ankle socks for starters! A good traditional OTK hand spanking over the seat of her skirt was far more exciting to me than all the girls in what is more typically seen as "sexy" clothing such as the one featured on the cover of that particular magazine (shown at the end of the post).
Unfortunately, as was quite often the case, the still shot for publicity purposes was very unlike the actual scene in the movie. Although Van Johnson's attire is more appropriate for being in the swimming pool, June's dressing gown would have rendered his attempt to spank her bottom even more ineffective than the skirt in the publicity still (and the ankle socks were missing!). I often wonder why those doing the stills knew so much better than the film's director what an audience would enjoy.

Spanking scenes in mainstream movies have always been interesting to me.
Here's that magazine cover I promised - the gold printing did make it feel like a special edition.
And, interestingly, here is one of the publicity posters for the movie - note which spanking image they chose to use!