The Princess Bride is a 1987 iconic fantasy film, directed by Rob Reiner, starring Cary Elwes and Robin Wright (honourable mentions are obviously due to Mandy Patinkin and André the Giant, two of the most charismatics rogues-turned-coprotagonists ever). It is the simple story of two lovers, how they faced the evils of a corrupted ruler and their happily ever after.
There is a bit of nostalgia to see how the narratological framework of the movies is used to introduce the plot and characters; the fictitious story of the two lovers is actually a fairy-tale told by a grandfather to his grandchild while he is sick in bed. It is a bedtime story. This kind of technique has been used less and less in my opinion in more recent years; yes, you may find flashbacks and meta-narrations, but these tend to be direct tie-ins with the whole of the movie and not separate frameworks.
Given how iconic this movie is, I do not have much more to add, and if you missed it as a child, although it did not necessarily age well (given some anticlimactic and surreal elements), I would advise a revisit. It features one of the best choreographed sword fighting scenes I have ever seen; experts agreed that out of many movies that feature similar scenes where everything is more theatrical and used for effects, The Princess Bride is on point (sword pun intended) with techniques employed and ability of the actors.
The premise of the movie is simple yet effective, enhanced by a good delivery and acting from the actors. The love story has a kind of fairy-tale charm to it, which is in accordance with the meta-plot, and the revenge saga does not need much explanation, just a few lines:
“Hello. My name is Inigo Montoya. You killed my father. Prepare to die.”
I would give this movie 6 out of 10 André the Giant pieces of trivias.